A similar product has been patented in China and abroad. Can foreign products be sold in China? If you can't be bound by anything.

1. First of all, patent protection is subject to geographical restrictions, that is, in which country you apply for a patent and get authorization, you will enjoy the patent right.

2. Look at the validity period and protection scope of the patent;

If you want to sell your products to China, it depends on whether the patent in China is still valid; If it is effective, look at the scope of protection of domestic patents. Patent infringement occurs when foreign products are completely or partially the same as domestic patent protection.

3. The time sequence of patent application may have an impact on the invalidation of later patents.

I suggest you consult the local patent office.