Sunwu County

Sunwu County (simplified Chinese: 孙吴县; traditional Chinese: 孫吳縣; pinyin: Sūnwú Xiàn) is a county under the administration of Heihe City in the north of Heilongjiang province, China, situated on the bank of Amur River, which demarcates the Sino-Russian border. The length of border line within Sunwu county is 36 km (22 mi).

Sunwu County is surrounded by Lesser Khingan Mountains, and its forest coverage is 45%. The urbanization level is 40%.

Geography and climate

Sunwu County has a monsoon-influenced humid continental climate (Köppen Dwb) with very warm, humid summers and severely cold, extremely dry winters. The monthly 24-hour average temperature ranges from −24.5 °C (−12.1 °F) in January to 19.9 °C (67.8 °F), and although temperatures consistently average above 10 °C (50 °F) from May to September, the annual mean, at −0.59 °C (30.9 °F), is low enough to form sporadic permafrost on sheltered sites, which is unusual for areas with this climatic classification. More than 70% of the annual precipitation occurs from June to September. With monthly percent possible sunshine ranging from 52% in July to 73% in February, the area receives 2,576 hours of bright sunshine annually.