1: according to article 69 of the latest patent law, parallel import is allowed. That is to say, whether Company B has obtained the patent right of B in China or not, it is not necessary to obtain the permission of Company B to import B from A, provided that the product B in country A is legal.
2: the patent right is regional. That is to say, the patent of country A does not apply to China. If Company B does not apply for the patent of B in China, Company A can manufacture B without the permission of Company B..
3: For parallel import, refer to answer 1.
4: It is still the problem of parallel import. As long as B purchased by Company C from Country A is a legal product, it can be imported into China without the consent of Party B.. Subsequent series are legal.
5: that's enough. Parallel import is not involved here. Parallel import refers to the act that the patentee obtains the patent right in both countries, then legally sells it from one of them, and then imports it into another country. It doesn't conform to this rule here. The patent law stipulates that the manufacture and import of patented products belong to the absolute protection scope of patents. Therefore, the import of B by Company A violates the patent right of Company B in China.