Do I have to go through the checkpoint when I come back from Metropark International Hotel?

Jinhai Lake is still in Beijing and has not left Beijing, so there is no checkpoint.

Jinhaihu Scenic Area, also known as Haizi Reservoir, is located in the south of Shangzhai Village, Jinhaihu Town, east 18km of Pinggu District, Beijing, and 85km away from Beijing. It is located in the triangle at the junction of Beijing, Tianjin and Tangshan, and is known as "Little Beidaihe". According to the records in Pinggu District, in the 18th year of Kangxi in Qing Dynasty (1679), a great earthquake occurred in Pinggu and Sanhe, forming a river canyon. 1959, newly built. 1985, Jinhaihu Reservoir was turned into a tourist area, named Jinhaihu Park. 1988, there is also the Golden Sea Lake Scenic Area. Jinhai Lake Scenic Area covers a total area of 22 square kilometers, including a building area of 0.8 square kilometers and a water area of 6.5 square kilometers.

Jinhai Lake Scenic Area is adjacent to Jinhai Lake Dam in the west, surrounded by water on three sides, green hills on three sides and exposed columns on all sides. There are dozens of natural and cultural landscapes such as Qiandao Lake, Lake Light Pagoda, Princess Jinhua's Tomb, Wanghai Pavilion and Sawtooth Cliff. There are cruise ships, speedboats, sailboats, pedal boats, battery boats, dragon boat races and other entertainment projects.