Under the full moon, a series of water lamp images are projected onto the Ong Ang Canal passing through the old city of Bangkok. For the first time, a small river that has flowed for over 200 years has encountered a colorful virtual water lamp, and the pitch black surface of the river is as brilliant as a starry river. Every year on the night of the full moon at the end of the lunar year, when the rainy season ends and the riverbed rises, people will place small lantern boats with candles and flowers on the river to thank the river god for his kindness, pray to avoid floods, and let misfortune go with the water. In the past, in order to facilitate the floating of small light boats, people used foam plastics to make the base of small light boats. As the number of lamps increases year by year, a large number of water lamps cause river blockages, leading to environmental pollution. This year, the Bangkok City Government launched the "Digital Water Lantern Festival", advocating the floating of virtual water lanterns to protect the environment. On the evening of the 27th, before nightfall, the canal was crowded with people buried in drawing digital water lanterns. Unlike in the past when people lined up in long lines, held heavy physical water lamps, and waited in the smoke of candles to light them up, the light emitters only need to select their favorite water lamp drawings from the organizers, or paint them on-site or online, and then send the drawings to the staff to project onto the river, where they can see their works "leaping on the water". College student An Nan and her friends stared closely at the river, searching for their own lamp amidst the colorful flowing water. He comes every year to put water lamps, and this is the first time he has tried this environmentally friendly way of putting lamps. According to data released by the Bangkok City Government, during this year's Water Lantern Festival, nearly 640000 water lanterns were salvaged and cleaned up in Bangkok alone, with over 96% of them made from environmentally friendly materials such as banana leaves and sugarcane bagasse. To reduce the pressure on the environment caused by lighting activities, experts have called for people to make water lamps using easily decomposable materials, such as ice cubes, bread, and fish feed, and also advocated for only one water lamp per household. However, experts admit that regardless of the material, candle smoke, bread grease, etc. inevitably cause air and water pollution. Regarding this, An Nan told reporters, "Although people have been trying to improve the materials used to make water lamps in recent years, there is still pollution and it takes manpower to salvage and clean them. In contrast, digital water lamps do not have these problems." "Everyone can draw a unique water lamp according to their own preferences, and through such activities, they can gather together and focus on completing a task, with a high sense of participation, zero emissions, and no pollution, giving new meaning to traditional festivals." An Nan said, hoping that digital water lamps will become a new choice for people to pay tribute to tradition and care for the future. (Lai Xin She)