What would be the best time for me to apply for a Chinese visa?

english.gov.cn

It is advisable that you apply for a visa one month in advance of your intended date of entry into China, and do not apply 3 months earlier than your intended date of entry. Your visa might expire before your intended departure date for China if you apply too early; but if you apply too late, you might not be able to obtain a visa in time for your scheduled departure. For instance, if you plan to enter China on July 1, the best time for you to submit your visa application is the early of June. If you need express service or rush service, you will be required to pay an extra visa fee plus express service fee or rush service fee.

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