BEIJING, July 13 (Xinhua) -- The Beijing municipal government said on Sunday that the city's state-owned enterprises (SOEs), institutions and social groups should adjust their working hours from July 20 to Sept. 20 to avoid traffic jams.

A notice issued by the municipal government said that, except for schools and institutions that provide essential services, SOEs should operate from 9 a.m. to 5 p.m.

Large shopping centers should open at 10 a.m. and stay open later in the evening.

Other institutions should operate from 9:30 a.m. to 5:30 p.m.

Government departments won't alter their hours, the notice said.

The notice also encouraged institutions to handle business online if possible and arrange flex-time arrangements where feasible.

新华网北京7月13日电（记者李志勇）北京市政府13日发布通知，要求从7月20日至9月20日期间北京市各单位实行错时上下班。

根据通知内容，7月20日至9月20日，北京市各级党委、政府及其所属部门、北京市各级人大、政协办公厅的上下班时间不作调整。

除承担城市运行和服务保障任务的企事业单位、社会团体、学校外，北京市其他各级国有企业上下班时间分别调整为9时和17时，大型商场上午开始营业时间调整为10时，晚上适当延长营业时间，其他事业单位和社会团体上下班时间分别调整为9时30分和17时30分。

同时，鼓励适宜网上办公的企事业单位试行网上办公，适宜弹性工作制的企事业单位也可试行弹性工作制。

>>>看奥运，学外语，沪江奥运外语专题