Chengkan Village has a history reaching back 1800 years - and still has most of its original layout. The small streets and alleys feel like a maze, and the buildings are a prime example of the Hui style architecture (white walls, grey tiles).
Chengkan is not (yet) as developed, thus has a local charme and is (currently) less touristy.
If you are cycling in the area, this village is worth stopping for and some discovery. The main entrance (and ticket office) is at the south end parking lot.