1. Cao Jin has successively carried out human resources services such as human resources outsourcing, engineering technical support, IT outsourcing, labor dispatch, and labor security affairs agency with more than 300 enterprises and institutions in various provinces and cities across the country.
2. Cao Jin has established three offshore oil technical service bases, namely, Shenzhen, Tianjin and Zhanjiang, and his business fields are distributed in offshore oil platforms such as Bohai Sea, Yellow Sea, South China Sea, East China Sea and overseas.