How is the general worker's treatment of mining machinery in sandvik?

Sandvik Mining Machinery Co., Ltd. is a British-owned factory in Shanghai, with very good welfare. My friend works as a workshop planner in Jiading, Shanghai, which is equivalent to a skilled general worker position. Now her monthly income is more than 4,000 yuan (actually after deducting social security and provident fund), and with bonus, she can get almost 1000 yuan a year. Today is the weekend. I work the day shift from Monday to Friday, so I don't have to work the night shift. I will share what I know with you and hope to adopt my answer.