For foreigners applying for visas in China, it is recommended to prepare the necessary documents and submit the visa application one month in advance.
However, it should also be noted that the entry validity period of Chinese visas is generally 3 months. If you apply too early, the visa may expire before your departure. Therefore, when preparing to apply for a visa, it is necessary to consider both your date of entry and the validity period of the visa.
Additionally, some types of visas may have an entry validity period of only one month or less, and in such cases, you may need to apply for the visa about two weeks in advance.
The above information is for reference only, and specific regulations may vary depending on individual circumstances and visa types.