Xingkai Lake is located more than 30 kilometers east of Mishan City, Heilongjiang Province, China, in the southeast of Heilongjiang Province in the Sino-Russian border area, adjacent to Mishan City and Hulin City in the north, and connected with Russia by land and water in the east and south. It is a permanent freshwater lake and the largest freshwater lake in East Asia.

興凱湖是地質運動地殼陷落而形成的構造湖。距今約1億年前的晚白堊紀時期，受地質運動影響，興凱湖地區分別沿三條斷裂帶開始斷陷，由開始的鏈珠狀湖泊合併成了三個稍大些的帶狀湖泊。

In the middle of the Paleogene, the depression was the first to develop, and the ribbon lake gradually deepened, and the three waters were connected to form a wide area of Daxingkai Lake. At the end of the Paleogene, the basin began to rise, and the water of the wide area of Daxingkai Lake gradually shrank, and at the end of the new century to the beginning of the Quaternary, the central uplift belt was fully exposed.

In the Quaternary period, mainly controlled by tectonic movements, as well as the influence of climate changes of cold and warm, dry and wet, six lake retreats and one lake inflow occurred, and finally this vast sea-like oval lake was left in the southern part of the basin, that is, the prototype of modern Xingkai Lake.

More than 6000 years ago, the ancestors on the north bank of Xingkai Lake created the "New Kailiu Culture", that is, the Neolithic Fishing and Hunting Culture. During the Tang Dynasty, Xingkai Lake was named "Meituo Lake" because the east bank of the lake belonged to Meizhou, Anyuan Prefecture, and the west bank of the lake belonged to Tuozhou, Dongping Prefecture; In Liaojin, because its lake resembles a moon qin, the momentum is like the sea, and it is also called "Beiqin Sea".

At the beginning of the Qing Dynasty, it was renamed "Xingkadian", and it was called "Xingkai Lake" during the Jiaqing period. In the tenth year of Shunzhi in the Qing Dynasty (1653 years), the Qing government classified the area around Xingkai Lake as a forbidden area and regarded it as the ancestral "land of Longxing".

In 1860, the Sino-Russian "Beijing Treaty" stipulated that China and Russia should be bounded by the two-point line from the source of the Songatsa River to the mouth of the Bailing River on the Daxingkai Lake, with the northern part belonging to China and the southern part being assigned to Russia.

With a total area of 1080 square kilometers, Xingkai Lake belongs to China in the north, Russia in the south, and 0 square kilometers in the Chinese side, making it the largest boundary lake on the Chinese border.

Xingkai Lake is located at the southern foot of Wanda Mountain at the southeast end of the Sanjiang Plain, with a total topography of high in the northwest and low in the southeast. The landform types are mainly floodplains and lake beaches, with low and flat terrain, complex micro-topography, many ancient river channels, oxbow lakes and large areas of lacustrine low plains.

Xingkai Lake is a tectonic lake formed by a fault depression in the earth's crust, which is elliptical in shape. Daxingkai Lake is 5 kilometers long from east to west, 0 kilometers wide from north to south, and 0 meters deep at its deepest; Xiaoxingkai Lake is 0.0 kilometers long from east to west and 0.0 kilometers wide from north to south.

A sand hill nearly 1 meters high is formed between the large and small Xingkai lakes, which is about 0 kilometers long and 0 kilometers wide. The sand hill is composed of quartz sand, and the vegetation on the hill is dominated by forest vegetation such as Xingkai Lake pine and Mongolian oak.

There is a large area of wetlands around the lake, which is dominated by vegetation types such as reeds, marsh willows, mosses, and camphors. From the edge of the big lake, to the northeast in turn to form the big lake gang, the sun gang, the second gang, the barren gang and the south gang, each gang around the big lake into the southeast and northwest arc sand dunes, the altitude is 70-0 meters, between the hills to form a swamp wetland with an altitude of 0-0 meters.

The climate is characterized by a temperate Chinese monsoon climate, humid and semi-humid areas. In spring, the temperature in the lake area is 1°C lower than that of the surrounding area; In summer, the weather is cool, there are few hot days, and the temperature difference between day and night is small; In autumn, the temperature is 0°C higher than the surrounding area, and there is a lot of autumn rain.

The Xingkai Lake basin belongs to the Ussuri River system, with a total of 8 rivers flowing into it, 0 in China, and only the Songatsa River flowing out of Xingkai Lake. Due to its location in the temperate monsoon climate zone, the summer precipitation is large, the river supply is mainly rainwater, and the water level of the lake is controlled by the water conditions of the rivers entering the lake, and the change is gentle.

The area of Xingkai Lake is rich in mineral resources, with many types and wide distribution. A variety of mineral resources such as marble, coal, peat, graphite, zinc, lead, copper, bauxite, ilmenite and other mineral resources have been discovered.

There are 617 species of higher plants, 0 species are trees, 0 species are shrubs, 0 species are lianas, 0 species are herbaceous plants, most of them are perennials, and Xingkai pine is an endemic tree species of Xingkai Lake wetland.

There are 21 species of vertebrates in the Xingkai Lake basin, including 0 species of fish, 0 species of Xingkai Qing, slightly red fish white, Xingkai Pei's meal fish sticks, etc., which are endemic species in this area. There are 0 species of mammals, the sika deer in Xingkai Lake is an endemic species, and the animals protected by other countries include black bears, red deer, snow rabbits, etc. A total of 0 species of birds have been recorded in the wetland, including 0 species of world-class rare birds such as red-crowned cranes, oriental white storks, Chinese mergansers, and white-tailed sea eagles.

Xingkai Lake has a total of 68 orders, 0 families and 0 species of fish, among which the red squid (commonly known as the big white fish) is the first of the four famous freshwater fish in China, and the salmon of the Ussuri River and the beachhead fish of the Suifen River are called the "three treasures of the side plug", and the beautiful white shrimp of Xingkai Lake are called the two unique specialties of Xingkai Lake.

旅遊景觀有當壁鎮旅遊度假區、蓮花景區、新開流景區、洩洪閘景區、龍王廟景區等，擁有大小興凱湖、獨具風韻的沼澤濕地、綿延百公里的金色沙灘、萬鳥雲集的壯麗景觀，被譽為“東方夏威夷”。