Spring is short, dry and dusty. In spring, a phenomenon occurs in Beijing known as the yellow wind . Fine dust particles are blown into the city from the Gobi desert. During this period it is common to find locals walking around with a mesh bag over their heads. But a hanky over your nose and mouth will do.
Autumn is the best time to visit China.
The air is dry and cool. All visitors to China must have a visa. To apply, you need two passport-sized photos. The forms can be obtained from any Chinese embassy or consulate. Your application must be written in English.