Nbsp; at the top of high-rise buildings in the city, high-power solid-state laser landmarks are used for omni-directional scanning. A unique laser night view can be seen several kilometers away. Through the laser system with a strong dazzling green laser beam continuously projected in the night sky, can be parallel direct, rotating radiation, rhythmic beam direction change, so that the building has become a city in the dazzling landmark and unique urban night scene, but also the promotion of the identity of the city landmark. The radius of 30W projection can be seen at 5 km. Under the control of the computer optics system, a variety of output modes can be formed, which can realize the roll and change of multi-beam, and can synchronize with music. Simple words and graphics can be written on the facade of buildings, even on the clouds. It has a strong entertainment effect. Product status: With the maturity of laser technology, the reliability, maintenance convenience and power consumption of laser water curtain and laser landmark have been greatly improved. Such as laser landmarks, under normal working conditions, 10000 hours for extremely low failure period. With 3 hours per day, it can run smoothly in 8 to 10 years, and the power consumption is less than 5 kilowatts.