ACKNOWLEDGEMENTS

We greatly thank scientists and staffs for the SFJ2000survey.The first author was partly supported by STA fellowship，the Chinese Academy of Sciences（KZCX3-SW-219），the National Natural Science Foundation of China（49904007），CAS foundation of national-wide excellent Ph.D.Dissertations and the National Major Fundamental Research and Development Project of China（G20000467）.The authors would like to thank Dr.Okuda，Dr.Tanahashi，Dr.Kano of AIST.Useful discussions with Dr.Yuan are appreciated.The first author is grateful to JST and JISTEC during his STA fellowship.(https://www.daowen.com)