In May 2020, Sun Moon Lake experienced a severe drought, the most severe in 50 years, causing the once azure lake water to recede, revealing dry, barren soil and various debris and objects buried at the lake bottom. In response, the staff of Fleur de Chine Hotel initiated the "Clean Lake One-Mile" activity every week. From the roadside to the lakeshore, they picked up discarded plastic bags, fishing waste, cigarette butts, and broken bottles and cans. By the end of 2021, they completed a full circuit around the lake, collecting a total of 1.1 tons of garbage. To this day, Friday mornings have become a regular Clear Lake Day for the staff of Fleur de Chine Hotel, inviting guests to join them in wholeheartedly protecting this precious treasure of Sun Moon Lake.