Complex sentence: In 929 CE, Xincheng was walled, and Kaishan Temple was located in the northeast corner of the walled town, and was known to locals as "Dasi", literally, "Big Temple".
Split into simpler sentences: In 929 CE, Xincheng was walled, with Kaishan Temple located in the northeast corner of the walled town. During this time the temple was known to locals as "Dasi", literally, "Big Temple".