"Oasis on the Sea" refers to the place name of China, Qingdao. "Warm seasons" refers to the place name Changchun in China.

1, the origin of Chongqing is like this. Zhao Dun, a native of Song Guangzong, was made King of the Duke of Zhou in 1 162, Crown Prince in171and abdicated by Xiaozong in189. In August of the same year, he proclaimed himself emperor. This is the origin of Guangzong's reign as king here and then as emperor, boasting of double happiness, hence the name Chongqing.

2. Changbai Mountain, located in the southeast of Jilin Province, is the birthplace of Songhua River, Tumen River and Yalu River, among which Songhua River originated from Tianchi Lake in Changbai Mountain. Historically, Changbai Mountain has always been a place where people in Northeast China live and work. 196 1 year, the Changbai Mountain National Nature Reserve with 210.5 million hectares was established.

2. Qingdao, referred to as Qing for short, was originally called Jiaoao or Qingdao or Island City, also known as "Oriental Switzerland". Located on the southeast coast of Shandong Peninsula, east of Jiaodong Peninsula, bordering the Yellow Sea in the east and south, and facing the Korean Peninsula across the sea. Qingdao has an international seaport and a regional hub airport. Qingdao is a city under the jurisdiction of Shandong Province, a city with separate plans, a sub-provincial city, an economic center city of Shandong Province, the first batch of coastal open cities in China, a national historical and cultural city, a national civilized city, a national health city, a national garden city and a national forest city, and it is also the happiest city in China.

4. Changchun, known as the "Spring City in the North", ranks among the four major garden cities in China, with the highest degree of greening in Asia; "China's happiest city" for nine consecutive times; "Made in China 2025" pilot city; "The first batch of urban design pilot cities in China"; China natural index 20 15 [4] China ranked sixth among the top ten scientific research cities? . 20 17 1 1 month, and it was confirmed that the honorary title of national civilized city would continue to be retained.