Kang, Yan-Fei
Qiao, Hai-Xia
Meng, Ya-Li
Xin, Zhen-Hui
Ge, Li-Ping
Zheng, Jin-Nan
Wang, Yi-Na
Funding for this research was provided by:
Natural Science Foundation of Hebei Province (B2016405026)
Young Elitist Foundation of Hebei Province (BJ2016003)
Guidance projects of Science and Technology of Zhangjiakou City (1621122H)
Guide projects of Department of Education of Hebei province (Z2017026)