There are no restrictions or requirements for returning to China. As long as the visa is valid, you can enter and leave the country many times, which is expensive. Entry and exit require ID cards and visas. Many people choose to return to China less than once a year, because returning to China for more than one year requires additional diplomatic and tourism taxes.
If the student visa is not in the Philippines for a long time, graduation certification is likely to be in trouble. Of course, if you can stand loneliness, you have the right to return to China after completing your studies.
I have been away for several years, but I just wrote a general outline, which may be different. There are many students there, and there are many parties for foreign students, both in Maccati and China. It's easy to ask.
May you love the beaches and the sea in the Philippines.