Dynamic mechanism of coal mine work safety in China 并列题名：Dynamic mechanism of coal mine work safety in China Dynamic mechanism of regional financial development in China Dynamics mechanism of rural labourers regional transfer in China Dynamic mechanism of urban-rural land structure change in China 并列题名：Dynamic mechanism of regional financial development in China 并列题名：Dynamics mechanism of rural labourers regional transfer in China 并列题名：Dynamic mechanism of urban-rural land structure change in China Brief history of work safety in China