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