I don't know what you really want to do, but I suggest you be careful.
Look, 5 rejected, 1 withdrawn, 1 unpaid annual fee. Almost completely annihilated, and none of them worked. Assess the situation, you can wait and see the result.
Also, a patent does not mean that it is declared good and can be used. There are many bad technologies in the patent, and all kinds of rubbish. At least the invention has undergone substantive examination and utility model form examination, so it is authorized. It is meaningless to believe blindly because there is a patent.
I recommend you to check and study on the official website of China National Intellectual Property Administration.
Good luck.