When the employing unit needs to extend working hours,they must consult with the trade union or the workers,and generally the extension should not surpass one hour a day,in special cases not more than three hours a day or not more than 36 hours a month.

• 用人单位延长工作时间时，必须与工会和劳动者协商，一般每日不得超过1小时，特殊原因每日不得超过3小时，每月不得超过36小时。