How the everlasting lamp works. (Eternal lantern at Yuhuatai Martyrs Cemetery in Nanjing)

The flame of the Yuhuatai Changming Lantern is about 30 centimeters high. There is an automatic control device inside, which can automatically start and stop the flame. It also has a weather-resistant device inside. Even if it encounters heavy wind and rain, after the flame is extinguished for a short time, it can be automatically re-ignited after automatic detection. If the fire source cannot be ignited after five times of automatic ignition, the automatic control startup can sound an alarm and automatically cut off the gas source to ensure the safety of gas equipment. The gas used in the ever-burning lamp is natural gas, which can ensure long-term, 24-hour uninterrupted ignition.