A view of the frozen Xingkai Lake, a border lake between China and Russia, in Northeast China's Heilongjiang Province. The largest freshwater lake in northeast China, Xingkai is well-known for its abundant biodiversity and complex ecosystems. During winter, the crystal-clear ice of the frozen lake creates an amazing landscape. (Photo: China News Service/Xu Hui)
A view of the frozen Xingkai Lake, a border lake between China and Russia, in Northeast China's Heilongjiang Province. The largest freshwater lake in northeast China, Xingkai is well-known for its abundant biodiversity and complex ecosystems. During winter, the crystal-clear ice of the frozen lake creates an amazing landscape. (Photo: China News Service/Xu Hui)
A view of the frozen Xingkai Lake, a border lake between China and Russia, in Northeast China's Heilongjiang Province. The largest freshwater lake in northeast China, Xingkai is well-known for its abundant biodiversity and complex ecosystems. During winter, the crystal-clear ice of the frozen lake creates an amazing landscape. (Photo: China News Service/Xu Hui)
A view of the frozen Xingkai Lake, a border lake between China and Russia, in Northeast China's Heilongjiang Province. The largest freshwater lake in northeast China, Xingkai is well-known for its abundant biodiversity and complex ecosystems. During winter, the crystal-clear ice of the frozen lake creates an amazing landscape. (Photo: China News Service/Xu Hui)
A view of the frozen Xingkai Lake, a border lake between China and Russia, in Northeast China's Heilongjiang Province. The largest freshwater lake in northeast China, Xingkai is well-known for its abundant biodiversity and complex ecosystems. During winter, the crystal-clear ice of the frozen lake creates an amazing landscape. (Photo: China News Service/Xu Hui)