What level of foreign languages do you need to work in bosch rexroth, such as technicians and quality engineers?

That depends on whether you want to go to Beijing office or Beijing factory. Generally speaking, Beijing Office has higher requirements for English and can communicate with foreign customers by telephone. If the requirements in the factory are lower, I wish I could read and write emails. The salary in the factory is much lower than that in the office, about 2-3K lower.