What I think are the must-see places for a day trip to Changchun:
1. Changchun World Sculpture Garden: a national AAAAA tourist attraction located in Nanguan District, Changchun City, Jilin Province, covering an area of 92 hectares.
2. Shenlu Peak Tourist Resort: 3 major thematic subdivisions are planned for Hanging Kettle National Forest Park, Deer Valley, and Return Town, including 8 hiking wooden trestles and 49 popular attractions.
3. Changchun Beihu Wetland Park: also known as Changdongdong Urban Ecological Wetland Park, it is located in the southwest of Changdongdong core area of Changchun Hi-tech Zone.
4. Lotus Mountain Pretty Sky Pond Water Park: located about 100 meters southeast of the intersection of Lotus Mountain Road and Longshuang Highway in Erdao District, Changchun.
5. Changchun Sanqing Guan: This is an ancient guan of Liao Dynasty, originally called "Qingyi Guan", and will build three thematic functional zones: Taoist Longevity Zone, Taoist Legal Activities Zone, and Taoist Culture Health and Recreation Zone in the future.