Yes Tan Zhichao, Director of Product Planning Department of Wei Chai Electric Power Co., Ltd. said that since 2006, Wei Chai has invested a lot of money in R&D in Guo Si. According to reports, Wei Chai's national four major product planning and design include 4- 13 liter multiple product series. The implementation of the national four emission standards will definitely bring about the upgrade of the after-sales service system. According to Tan Zhichao, Wei Chai has 1826 service stations in Guosan, and Wei Chai will upgrade the skills of these service stations to meet the after-sales service demand of Guo Si diesel engines.