Unless otherwise specified, a visa is valid from the date of issue.
A visa expires if one of the following situations occurs:
(1) The visa has passed 24:00 (Beijing Time) on the date of entry, namely the ‘Enter Before’ date given on the visa page
(2) The number of entries has been used up
(3) The visa has been revoked or cancelled by the authorities of the Chinese government
(4) Other circumstances governed by the Chinese laws