The validity of a China visa is the period between the “Issue Date” and “Enter Before” date shown on your visa. It is usually 3 months, 6 months, 1 year, and sometimes even 10 years. Holders please note that they must enter mainland China before 24:00 of the “Enter Before” date. Otherwise, the visa will expire and cannot be extended no matter whether there are entries left, and reapplication is required.