If you can be sure that the foreign patent has not been protected in China, you can completely produce it and it will not be an infringement.
Even if you apply for a Chinese patent, it may not be authorized, but it is still recommended. You should apply for a Chinese patent first. Otherwise, someone else in China will apply for the patent first, and the patent office happens to grant him the authorization without searching. It will be a lot more troublesome and more expensive for you to invalidate the patent. So it is better to apply for it yourself. One, it’s best if you can authorize it. If you can’t authorize it, you can still disclose the technical content. If someone applies for a patent after you and files a lawsuit, it will be invalid and it will be easier for him to prove it.