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What is the treatment of Naichi Lanzhou Pump Industry Co., Ltd., which is better, technical support or R&D design?

I have been doing mechanical research and design.

To put it bluntly, technical support means doing technical things, as well as sales or production.

It is better to do R&D and design in the future, and it is better to change jobs in the future.

Wages depend on individuals, and occupations do not determine wages.

It's better to do R&D and design during the break.