I wish I had ran across and linked to this yesterday:

Beijing lay under a thick cloud of smog on June 4. Tian'anmen Square remained open to tourists walking through it to visit the Forbidden City, and the scene at the Square appeared to be the same as ever.

今年的六月四号是个星期天，北京厚云笼罩，天安门广场并没有关闭，或者禁止游客参观。