What are the secondary units of Tianjin Petrochemical Company? Which benefit is better?

Tianjin Petrochemical Company is a whole, so the benefit of the secondary unit is not too bad. The salary level of the whole company is generally the same according to different positions, and there will not be much fluctuation. If you can choose, it is suggested to choose three main business operation departments: oil refining department, olefin department and chemical industry department. If possible, there is also a joint venture in China-Saudi Arabia, with relatively high income. It would be nice to go there.