The jadeite sold in Guizhou Tourism Bonded Park is real, because Guizhou is a major province of jadeite production, and many jadeites are mined locally. The factories engaged in jadeite trade in the Bonded Park are also qualified, so their jadeites must be regular.
Generally speaking, the price of real jadeite is relatively high. However, Guizhou is a famous tourist destination with various local specialties, among which jade is the most famous, so many tourists still buy it.