What does it mean to apply for a travel visa type that is valid once a year?

Taking once a year as an example, it does not mean that you can only go once in a year, but it means that the validity period of the visa is 1 year. After traveling to and from Hong Kong and Macao within 1 year, you can apply for the visa again. , there is no limit on the number of applications. If you do not go within 1 year, the endorsement will expire and become invalid, and you can apply again.

There are four types of endorsements: L endorsement (i.e. group travel endorsement, must enter and exit with the tour group); G endorsement (i.e. individual travel endorsement, not subject to group travel restrictions, can travel freely) ;S endorsement (i.e. business endorsement); T endorsement (i.e. family visit endorsement);