Introduction to the Thousand Buddha Cave: There are 239 cliff statues of the Tang Dynasty in the Thousand Buddha Cave, plus a total of 400 statues with only ax chisel marks that have not yet been formed. It has become a symbol of the Tang Dynasty's advocating for Buddhism and the prosperity of Buddhism. It has a high appreciation and research value. The most precious relic in the cave is undoubtedly the self-portrait carved on the stone wall by Mi Fu, one of the four great calligraphers of the Northern Song Dynasty. The portrait is 1.2 meters high, with a calm and elegant demeanor.