(2) English is mainly about reading and writing technical documents, especially when the products are involved in the international market, which is very important in patent retrieval.
(3) Japanese or German, both of which account for a relatively high proportion in patent literature, are used more.
(4) There may be more related work in the enterprise in the future, such as patent transfer and licensing, patent invalidation and litigation, and other intellectual property rights, so you can pay attention if you have the opportunity.