You can buy their trademarks.
You can try to revoke their trademark rights and register yourself.
4, whatever, I just used it. If you want to pay me, go to court! Of course, maybe it's not just an economic case, after all, it's drugs, which has become a criminal case, which is very sad.
Actually, there are many agents now. I suggest you find Bajie's intellectual property rights and so on, register a good brand of your own and maintain it slowly. In a few years, you may be another sunflower pharmaceutical industry.