Qianzhangyan Introduction: Qianzhangyan is a huge rock wall opposite Tianzhu Peak of Nanjianyan. The top is about 1150 meters above sea level, the relative height is about 70 meters, the width is about 120 meters, and the inclination angle is close to 90 degrees. The rock wall It is smooth and flat, gray-brown in color, with few plant growths, and its lithology is volcanic rhyolite and clastic rock. It is particularly spectacular when viewed from the Yunting Pavilion.