Staying On After the Canton Fair: How to Extend an M Visa in Guangzhou, the 7-Day Line, the Cap and Your Supplier's Letter

Checked on 27 October 2026. We are an interpreting and translation company in Guangzhou (Guangzhou GuanRi Translation Service Co., Ltd.). We are not the police, not a law firm, not a visa agency and not the organiser of the Canton Fair. The services this article ends up recommending, an interpreter for the factory visits you stay on for, and translation of foreign-language papers into Chinese, are ones we sell ourselves. This is not legal advice. Every rule below comes from an official text linked in the sources; whether your stay is extended, and by how much, is decided by the public security exit-entry office, not by us. Where a sentence is our own reading or our own arithmetic rather than the wording of an official text, we say so.

This article is for a buyer who came to the 140th Canton Fair on an M (business) visa, or another short-stay visa, and wants to stay on after the fair: to visit factories, check samples or finish a negotiation. If you came without a visa (visa-free entry or the 240-hour transit policy), the rules are different; they are in our article on visa-free stays after the fair. If your passport has been lost or stolen, start with our article on a lost passport.

1. Which line is yours

2. How long you can stay, counted the official way

Article 29 of the Exit and Entry Administration Law covers visas whose printed stay is 180 days or less. Its second paragraph (2 sentences in the official English; the Chinese is 2 sentences too):

Where the duration of stay needs to be extended, the visa holder shall file an application with the exit/entry administration of public security organ under the local people’s government at or above the county level in the place of his stay seven days prior to the expiry of the duration specified in the visa, and shall submit information of specific application matters in accordance with relevant requirements. If upon examination, the reasons for extension are appropriate and sufficient, such extension shall be granted; if an extension is denied, the foreigner shall leave China on the expiry of the duration.

And its third paragraph, which is the cap (1 sentence):

The accumulated length of extension shall not exceed the original duration of stay specified in the visa.

Three things follow.

The day count starts the day after you enter. Article 36 of the Regulations on the Administration of the Entry and Exit of Foreigners defines the visa's duration of stay (2 sentences in the official English, 1 in the Chinese; the split is the English text's own):

(3) The duration of stay specified in the visa means the period of time during which the visa holder is allowed to stay in China after each entry. It begins from the next day of entry;

An example, which is our arithmetic and not an official one: you entered on 29 October on a visa with a 30-day stay. Day 1 is 30 October, so day 30 is 28 November. The application has to be in at least seven days before that. Exactly how the office counts the seventh day, the texts do not say; our suggestion is not to leave it later than 20 November.

The cap is the stay printed on your visa. The National Immigration Administration's service guide for visa extension, change and reissue (17 July 2019) gives, for an M visa, an extension of not more than 180 days, and then repeats the law's rule that the extensions together may not be longer than the stay originally printed on the visa. In our reading, for an M visa with a printed stay of 180 days or less, the second rule is the one that binds: a 30-day stay can be extended by 30 days at most in total, a 60-day stay by 60 days. For some other visa types the guide's own limit is lower; an L, C, G or J2 visa can be extended by not more than 30 days. The office can also grant less, or refuse.

An extension belongs to this entry only. Article 14 of the regulations, first paragraph (2 sentences in the official English, 1 in the Chinese):

The decision made by the exit and entry administration authority of the public security organ to extend the duration of stay specified in a visa is only valid for the current entry and does not affect the number of entries or the validity period of the entry specified in the visa. However, the total period of extension shall not exceed the original duration of stay specified in the visa.

Its second paragraph says that once the stay is extended, you shall stay for the purpose of the original visa and within the extended period. For an M visa, that means the business purpose you came for.

The 7 days are counted back from the end of the stay, not from the end of the visa. The regulations use two different terms: the validity period of entry, which is the time in which you may enter (Article 36(2)), and the duration of stay (Article 36(3)). The Guangzhou Public Security Bureau's question-and-answer page of 17 June 2025 says in Chinese that the application is made 7 days before the visa's stay ends; its official English reads (1 sentence quoted; the English answer goes on to list the papers):

Application for visa extension and renewal shall be made 7 days before the expiration of the visa validity.

"Visa validity" in that English sentence reads like the entry validity, which is a different date. The Chinese on the same page, and the law, say the stay. Count from the end of the stay.

Two last points on decisions. Article 29 says an extension is granted where "the reasons for extension are appropriate and sufficient"; it is a judgement, not an entitlement. And Article 36 of the law says the office's decision not to extend is final. In the official English that article lists "rejecting applications for visa extension or reissuance"; the Chinese also names change (换发). Go by the Chinese.

3. What Guangzhou asks for, and where to go

The Guangzhou Public Security Bureau's service guide for M visas (a Word file in the archive "外国人普通签证申请" on its service-points page; the file inside is dated 22 November 2023; Chinese only) covers both extending an M visa and changing to one. Its general list has the same six kinds of item as the bureau's 17 June 2025 answer, which has an official English version (the wording differs slightly; the guide says the accommodation form must be valid "in this city"). These are the six items from that answer, in its official English:

1. Valid passport or other international travel documents and the original and photocopy of his or her valid passport and visa;
2. Completed Foreign National Visa Application Form;
3. A digital photo for the purpose of Guangdong entry/exit documents and its Inspection Note;
4. The Overseas Personnel Temporary Accommodation Form valid in Guangzhou;
5. Other relevant supporting documents;
6. Other certificates as required by the public security authority.

For an M visa, the Guangzhou guide spells out item 5. For an extension, the first of its three points (1 sentence in the Chinese; our working translation):

For an extension of an M visa, submit a letter of certification issued by an inviting or receiving entity or individual in this city; where the partner is an individual, the letter shall be signed, and proof of local permanent household registration or proof of local residence shall be submitted.

Its third point asks for the receiving entity's registration certificate, with a note that the entity files online in the city's system for entities dealing with foreigners. So when your supplier writes the letter, ask whether the company is already filed in that system; if it is not, the company has to do that first, and the list asks for its certificate, so ask early. The guide does not say what the letter must contain. Ask the counter, or 12367, before the supplier writes it.

Item 4 is the accommodation form. If you are in a hotel, the hotel registers you; ask the front desk for the form. If you are staying in a private home, the registration is yours or your host's, within 24 hours of arrival (Article 39 of the law), and since 21 September 2026 the National Immigration Administration has offered online registration for stays outside hotels across the country (Announcement No. 7 of 2026). The announcement says online registration has the same legal effect as registering in person; whether the online record can be handed in as the form on Guangzhou's list, it does not say. Ask the counter. More on the registration itself is in our article on accommodation registration.

Five more things from the national guide and the regulations:

• Time. The receipt of acceptance is valid for up to 7 working days, and the decision is made within that time. Article 13 of the regulations adds (1 sentence quoted from its third paragraph): "During the period of time when the applicant’s passport or other international travel documents are retained for processing his or her application for a visa or permit, the applicant may stay in China legally on the strength of the receipt of acceptance." If papers are missing, the office tells you in one go what to add; until it accepts the application there is no receipt.
• Checks. The national guide says the office is to check that the reason is true, by interview, telephone enquiries or on-site checks; it may call you, or the entity or person involved, to an interview, and an applicant who does not attend at the agreed time without good reason may be refused. Keep your phone on, and tell your supplier the office may contact them.
• Translations. The national guide ends with the line that foreign-language supporting papers must be translated into Chinese. If the supplier's letter is in Chinese, this matters only for anything else you bring.
• Truthfulness. The national guide lists, among the applicant's duties, submitting materials truthfully and being responsible for the truth of their substance; making things up in the application is a ground for refusal under Article 21 of the regulations. The letter should describe what you are really doing.
• Fees. The national guide lists fees by type of visa (for countries without a reciprocal arrangement, RMB 160 for a zero-entry visa, RMB 206 for single entry and so on) and says reciprocal countries pay by their own standard; it does not name a separate fee for an extension. Ask at the counter what your extension costs.

Who may file for you: the national guide says the application is made in person, and lists three cases in which, in our translation, the inviting entity or individual, a relative or a professional service agency may apply for you: you are under 16 or 60 or over, or have difficulty moving because of illness or other reasons; this is not your first entry and your record of stay or residence in China is good; or the inviting party has made arrangements to guarantee your costs in China. If you have been to China before and your record is clean, look at the second case. The visa itself is collected in person with the receipt. Our article on who can file a visa or residence permit for you goes into this.

Where: the Guangzhou guide names the exit-entry administration of the Guangzhou Public Security Bureau and the county- and district-level exit-entry offices delegated by the Ministry of Public Security's exit-entry administration. The bureau's table of service points lists the reception hall for foreigners at 155 Jiefang South Road, Yuexiu District, Monday to Friday 9:00–12:00 and 13:00–17:00, and Saturday the same hours for urgent cases; holidays are arranged separately. The other halls in the table list weekday hours only.

4. During the fair: what was announced for the 139th, and what we did not find for the 140th

On 7 May 2026 the Guangzhou Public Security Bureau's website carried a Guangdong police report on the services they ran for the 139th Canton Fair. Two consecutive sentences from it (2 sentences; Chinese only, our working translation):

Foreign merchants could apply directly for visas, extensions, changes and reissues with the fair invitation, buyer badge or guest badge. An urgent service was opened at the same time: applications with urgent reasons could be completed on an expedited basis within 3 working days, so that foreign merchants' exhibiting and business talks would not be delayed.

The same report says the police set up an on-site service point at the fair complex, offering passport loss certificates, visa consultation and guidance on procedures.

That was the 139th fair, written up after it ended; in this column the 139th arrangements appear only in that report, so not finding a notice for the 140th tells you little. On 27 October we read the first three pages of the exit-entry news column on the same website, down to items from July 2025, and did not find a similar notice for the 140th. That does not mean the arrangements are not in place this session. It means you should ask: call +86 12367, or ask at the police service point if you find one at the venue, whether the badge is accepted in place of the letter this time and whether the 3-working-day urgent route is open.

5. If you are short of time, already over, or refused

Fewer than 7 days left. The law draws the 7-day line and is silent about what happens after it. Do not read that silence either way. Call +86 12367 now and go to the office in person the same day with your passport and all the papers in section 3. If the office does not accept the application, leave China before your stay ends, that is, by the end of your last day.

Already over. Article 78 of the law (1 sentence quoted, from its first paragraph; the second is about guardians of children):

Foreigners who reside in China illegally shall be given a warning; where circumstances are serious, they shall be imposed with a fine of RMB 500 yuan per day, with a cap of RMB 10,000 yuan in total, or be detained for not less than five days but not more than 15 days.

Article 62 adds that a foreigner who resides illegally may be repatriated, and that a repatriated person may not enter China for 1 to 5 years from the date of repatriation. Article 81 adds that a foreigner who violates Chinese law and is no longer suitable to stay may be ordered to leave within a time limit, and that where a violation of the law is serious but not a crime, the Ministry of Public Security may deport the person, who may then not enter China for 10 years. An overstay can also count against an extension: Article 21 of the regulations lets the office refuse an applicant who has violated Chinese law and is not suitable to stay. Under Article 70, warnings and fines of up to RMB 5,000 may be decided by the exit-entry office; heavier penalties are decided by the public security organ or the border inspection authority. Go to the office as soon as possible; a fine, where one is imposed, is counted per day. If you want legal advice, contact a practising lawyer at the same time, and do not let finding one delay you.

Refused. The decision is final. Leave before the stay ends; that is what Article 29 requires. If the decision reaches you after the printed stay has ended, ask the office there and then by what date you must leave, and leave by that date.

6. Where we come in

What we sell is interpreting and translation, not visa services; the call, the letter and the visit above are things you and your supplier can do yourselves.

If you are staying on for factory visits, that is the work an escort or consecutive interpreter does. Our FAQ page lists escort and consecutive interpreting from RMB 200 per hour or RMB 800 per full day, depending on language pair and subject; prices exclude tax, plus 6% for a VAT special invoice or 3% for a general invoice; it also says new clients typically pay a 30–50% deposit, and that common pairs (Chinese with English, Japanese or Korean) can usually be scheduled 1–2 weeks ahead and rare pairs should be booked 4–8 weeks ahead. Book the interpreter for dates inside the stay you already have, or after the office has decided; do not plan visits on days the extension has not yet given you.

Our FAQ page lists escort interpreting for business meetings, factory tours, court depositions and small-group settings; if you want someone with you at the exit-entry office, ask us when you book. Whether an interpreter may come up to the counter is decided by the office on the spot. If the office asks for a foreign-language paper in Chinese, our FAQ page lists certificates at typically RMB 50–120 per document, depending on language and complexity, plus RMB 30 per document for a certified translation with our company seal and translator credentials. Ask the office first what kind of translation it accepts; we do not decide that. If the factories are outside Guangzhou, tell us the city when you ask for a quote.

Interpreter profiles are in the interpreter directory. Write to us on WhatsApp / WeChat (WhatsApp +86 139 2416 6640, WeChat Saralee93) or through the contact page.

Everything above is limited to Guangzhou and to the texts we read. An office can ask for papers the texts do not mention; other cities' lists differ, and the office's answer on the day is what counts.

Sources

1. Exit and Entry Administration Law, official English (Articles 29, 36, 39, 62, 70, 78 and 81): https://en.nia.gov.cn/n147418/n147458/c155978/content.html; Chinese text: https://www.nia.gov.cn/n741440/n741547/c1013311/content.html
2. Regulations on the Administration of the Entry and Exit of Foreigners, official English, 2013 text (Articles 13, 14, 21, 25 and 36): https://en.nia.gov.cn/n147418/n147458/c155970/content.html; the 2025 amendment, which leaves these articles unchanged, as carried by the Guangzhou Public Security Bureau (in Chinese): https://gaj.gz.gov.cn/zwfw/ywtd/crjimmigration/crjzx/content/post_10409663.html
3. National Immigration Administration, service guide for visa extension, change and reissue, 17 July 2019 (in Chinese): https://www.nia.gov.cn/n741445/n741604/n1787224/n1795789/c1791261/content.html
4. Guangzhou Public Security Bureau, exit-entry service points and guides (the M visa guide is in the archive "外国人普通签证申请"; the table of service points for foreigners is on the same page; in Chinese): https://gaj.gz.gov.cn/zwfw/ywtd/crjimmigration/crjzx/content/post_9339149.html
5. Guangzhou Public Security Bureau, "Which documents are required for foreign nationals to extend or renew their visas?", 17 June 2025 (Chinese with official English): https://gaj.gz.gov.cn/zwfw/ywtd/crjimmigration/crjzx/content/post_10314292.html
6. Guangzhou Public Security Bureau website, Guangdong police report on exit-entry services for the 139th Canton Fair, 7 May 2026 (in Chinese): https://gaj.gz.gov.cn/zwfw/ywtd/crjimmigration/crjzx/content/post_10801612.html
7. Guangzhou Public Security Bureau, exit-entry news column (first three pages read on 27 October 2026): https://gaj.gz.gov.cn/zwfw/ywtd/crjimmigration/crjzx/
8. National Immigration Administration, Announcement No. 7 of 2026 on nationwide online accommodation registration for stays outside hotels, 21 September 2026, as carried by the Guangzhou Public Security Bureau (Chinese with official English): https://gaj.gz.gov.cn/zwfw/ywtd/crjimmigration/crjzx/content/post_11035896.html
9. Guangzhou Public Security Bureau, notice on passports for Chinese citizens, 14 August 2024, cited only for the line saying the 12367 hotline answers 24 hours: https://gaj.gz.gov.cn/zwfw/ywtd/crjimmigration/crjzx/content/post_9813298.html
10. Translation China, FAQ page (interpreting and certificate translation rates, booking lead times, read 27 October 2026): https://www.translationchina.com/m/en/faq/