Who knows the income of optical thin film engineers?

Premise: working for more than 5 years, engaged in optical thin film technology, good technical ability, good experience or professional knowledge in some film systems, and good foreign language.

Treatment: Beishangguangshen 10000~ 15000, other cities in Yangtze River Delta and Pearl River Delta 8000~ 10000, and inland cities such as Wuhan and Changsha 6000~9000.