What does that mean? You can only go back and forth to Macau once a year, and Hong Kong twice? What are the requirements for multiple visas? For example, a trip to Macao, is it the same?

Hong Kong: You can go twice on February 14 and 20 16 at the latest, and each stay cannot exceed 7 days.

Macau: You can go to 1 time on February/4, 20 16 at the latest, and each stay will not exceed 7 days.

Personal travel (G) seems to be limited to two times at a time. Those who want to visit relatives or travel for many times can only be found on the website of the Provincial Public Security Department.

I went there once, and I can sign it again this year. It will take a while to sign it for the second time (it seems that different provinces have different policies and different intervals).

You have to pay a new fee every time you apply for an endorsement. Hong Kong and Macao endorsements will be charged separately. Just go to Hong Kong and apply for a Hong Kong endorsement, not Macau. You don't have to be Hong Kong to go to Macau alone, and you can save some money.