YANG Jie was born in Shijiazhuang of Hebei province, China, in 1980. She has the doctor degree and is the lecturer. Her specialty is the affection and protection of ESD and EMP. E-mail: yangjjj @sina.com ZHANG Xijun was born in 1969. She is an associate professor. Her specialty is the affection and protec- tion of ESD and EMP. E-mail: zxjlzy@ 126.com DONG Kangning was born in 1989. He is a master student. His specialty is the affection and protection of ESD and EMP.