Photo taken on Nov. 8, 2013 shows the Heilongjiang River covered by mist in Huma County, northeast China's Heilongjiang Province. (Xinhua/Zhou Changping)

Photo taken on Nov. 8, 2013 shows the Heilongjiang River covered by mist in Huma County, northeast China's Heilongjiang Province. (Xinhua/Zhou Changping)

Photo taken on Nov. 8, 2013 shows people taking pictures of the mist-covered Heilongjiang River in Huma County, northeast China's Heilongjiang Province. (Xinhua/Zhou Changping)

Photo taken on Nov. 8, 2013 shows the Heilongjiang River covered by mist in Huma County, northeast China's Heilongjiang Province. (Xinhua/Zhou Changping)

Photo taken on Nov. 8, 2013 shows the Heilongjiang River covered by mist in Huma County, northeast China's Heilongjiang Province. (Xinhua/Zhou Changping)

Photo taken on Nov. 8, 2013 shows the Heilongjiang River covered by mist in Huma County, northeast China's Heilongjiang Province. (Xinhua/Zhou Changping)

Photo taken on Nov. 8, 2013 shows the Heilongjiang River covered by mist in Huma County, northeast China's Heilongjiang Province. (Xinhua/Zhou Changping)