1. Institute of Applied Physics and Computational Mathematics, P. O. Box 8009, Beijing 100094, China
2. Center for Applied Physics and Technology, HEDPS, Peking University, Beijing 100871, China
3. IFSA Collaborative Innovation Center of MoE, Shanghai Jiao-Tong University, Shanghai 200240, China
4. Institute of Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027, China