He is a member of the Communist Party of China. Currently, he serves as an assembly fitter in the third assembly workshop of the General Assembly Factory of NHI. He was awarded the May Day Labor Medal of Liaoning Province in 2021.

In the wind tower project, Junjie Cai unique "Xiao CAI Roller Rule" increased the cylinder forming efficiency by six times and achieved a product accuracy of 100%. With the unique skills of sheet metal shaping, the 5-point serial flame shaping method has solved the deformation problem of large workpieces, and the technique has been included in the company's process standards. The anti-disengagement device for the push-pull crane he developed has been granted a national patent, solving the pain points in the industry. Led the team to overcome the manufacturing difficulties of military-grade optical platforms and achieve one-time qualification for inspection. It only took one month to complete the drawing of the parts for the belt conveyor of the Nanjing shield machine and deliver the belt conveyor on schedule, setting a new industry speed record. In recent years, the cumulative innovative achievements have created benefits amounting to 2 million yuan. In 2017, he was awarded the title of "Shengjing Master Craftsman".