Tashkorgan is the only Tajik autonomous county in China, and the local Sarikoli and Wakhi Tajiks — Iranian-speaking, Ismaili Muslim, and quite distinct from the Uyghurs of the rest of Xinjiang — have their cultural centre in the small park near the centre of town. There are statues, signboards, and on weekends some staged music and eagle-dance performances aimed at domestic Chinese tourists.
The park is more useful as a way in than as an attraction in its own right. The dances and the embroidered hats and dresses on display are real traditions, and the chance to read a few paragraphs about Tajik history before walking out into the town and meeting actual Tajiks is worth half an hour. If you can find someone to talk to, ask about the Pamir highways and the family connections that still cross into Tajikistan and Afghanistan despite the closed borders.