1977-1982 Technician and Assistant Engineer of Ventilation District of Jinhuagong Mine of Datong Mining bureau.
1977 - 1982大同矿务局晋华宫矿通风区技术员、助理工程师Datong Mining bureau。
1982-1984 Deputy Director and Director of Ventilation District of Jinhuagong Mine of Datong Mining bureau.
1982 - 1984大同矿务局晋华宫矿通风区副区长、区长。
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