Is the recruitment of Shanghai subway security inspectors true or false?

Really. It's true in the advertisement for the security inspector of Shanghai Metro, so it's true. Shanghai, referred to as "Shanghai" or "Shen" for short, is a provincial administrative region, municipality directly under the Central Government, national central city, megacity and core city of Shanghai metropolitan area in People's Republic of China (PRC), and is an international economic, financial, trade, shipping and scientific and technological innovation center of China approved by the State Council.