Black City and strange woods use pass and shuttle bus, a total of 150 yuan. Ticket check is also very strict. Black City only has the tip of the iceberg that remains in the city pool, and now there are fences and special care, not close. Far from the corner of the city pool. This is the end of the trip to the strange forest, the most complete and grandest ancient city site on the northern line of the ancient Silk Road. The city was built during the Xixia regime in the ninth century. Today, the city is also buried in rich precious documents of the Xixia and Yuan Dynasty. In recent years, due to the serious sand desertification in the surrounding area, quicksand has eroded the black city from the east, west and north, and many sites have been buried under the sand.