Autumn Pear is also called sour pear scientific name of An Pear.

Distribution of Hebei yanshan area and northeast. The fruit is about 200 grams, flat round, more sour when ripe, a little light sweet. Resistant to storage and transportation, used to be more winter in the fruit is scarce to eat, after a few months of storage, the fruit becomes soft, sour taste is reduced, taste becomes better, but the color is worse as if rotten, so Beijing, Tianjin and other places also known as rotten sour pear.

Sour pear itself acidity is higher so, in the countryside directly used for vinegar, called sour pear vinegar, sour pear vinegar acidity is low, there is a sweet flavor, mixed with cold dishes is very delicious. Sour pear tree life is long, in the Yanshan area of the old sour pear tree up to one hundred years or so, if the management of proper, single plant yield up to five hundred kilograms.

Introduction of Yanshan Mountain

Yanshan Mountain is one of the famous mountain ranges in northern China. It is strategically important. West from Zhangjiakou City, Wanquan County and Huai'an County within the Yanghe River, east to the Shanhaiguan, north of the Damshang Plateau, the seven old map of the mountains, Nuruerhu Mountain, southwest of the Guan ditch and the Taihang Mountains. The south side of the Hebei Plain, with a large difference in elevation. Luan River cut off this mountain, the formation of the gorge - Xifengkou, Chaohe cut to form the Gubeikou and so on.

Since ancient times for the north-south transportation corridor. In the military is also a very good position, ancient and modern wars, is often a place of war. Yanshan geological structure is exceptionally complex, with typical karst stalactite strata, more limestone layers and quartzite, thousand shale, slate, sea rock, sedimentary rocks, etc., stone appreciation resources are very rich.