It is too difficult to apply for family permission in Singapore.

I am also in Singapore now. I'm a publicist. This happens all the time. Maybe because you didn't bring enough in Singapore. My grandma can come as soon as my parents apply. Never been rejected. But some of my mother's friends seem to be in the same situation as China. You can appeal, remember that the appeal was successful. You can apply again. You can rest assured of one thing. Human resources can't lie to you. Singapore is not like other countries. So you can rest assured that they won't be so irresponsible. It should be caused by other reasons. You write an appeal letter and hand it in. If the appeal is successful, they will watch it again. Otherwise, ask your boss to write you a letter telling you what to recommend and so on. Come on, hehe.