# 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 −23.3 °C (−9.9 °F) in January to 20.4 °C (68.7 °F), while the annual mean is +0.18 °C (32.3 °F). More than three-fourths 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.
Climate data for Sunwu, elevation 235 m (771 ft), (1991–2020 normals, extremes 1971–2010) :
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 1.6 (34.9) | 6.0 (42.8) | 19.0 (66.2) | 26.9 (80.4) | 34.6 (94.3) | 38.7 (101.7) | 36.2 (97.2) | 34.1 (93.4) | 32.3 (90.1) | 26.2 (79.2) | 11.5 (52.7) | 1.6 (34.9) | 38.7 (101.7) |
| Mean daily maximum °C (°F) | −14.7 (5.5) | −9.2 (15.4) | −0.5 (31.1) | 10.6 (51.1) | 19.3 (66.7) | 24.8 (76.6) | 27.0 (80.6) | 24.7 (76.5) | 19.0 (66.2) | 9.1 (48.4) | −4.5 (23.9) | −14.3 (6.3) | 7.6 (45.7) |
| Daily mean °C (°F) | −22.5 (−8.5) | −17.7 (0.1) | −7.6 (18.3) | 4.1 (39.4) | 12.3 (54.1) | 18.3 (64.9) | 21.2 (70.2) | 18.8 (65.8) | 12.0 (53.6) | 2.6 (36.7) | −10.6 (12.9) | −20.9 (−5.6) | 0.8 (33.5) |
| Mean daily minimum °C (°F) | −28.1 (−18.6) | −24.7 (−12.5) | −14.5 (5.9) | −2.5 (27.5) | 4.7 (40.5) | 11.4 (52.5) | 15.6 (60.1) | 13.4 (56.1) | 5.6 (42.1) | −3.1 (26.4) | −15.8 (3.6) | −26 (−15) | −5.3 (22.4) |
| Record low °C (°F) | −48.1 (−54.6) | −44.8 (−48.6) | −39.9 (−39.8) | −22.2 (−8.0) | −11.5 (11.3) | −2.0 (28.4) | 3.2 (37.8) | −1.6 (29.1) | −11.7 (10.9) | −27.9 (−18.2) | −36.2 (−33.2) | −43.3 (−45.9) | −48.1 (−54.6) |
| Average precipitation mm (inches) | 5.5 (0.22) | 5.6 (0.22) | 9.7 (0.38) | 21.5 (0.85) | 48.5 (1.91) | 94.8 (3.73) | 139.4 (5.49) | 120.4 (4.74) | 65.3 (2.57) | 27.5 (1.08) | 11.4 (0.45) | 8.4 (0.33) | 558 (21.97) |
| Average precipitation days (≥ 0.1 mm) | 7.4 | 4.8 | 5.8 | 7.2 | 11.3 | 13.5 | 15.1 | 14.4 | 10.7 | 7.4 | 7.6 | 7.7 | 112.9 |
| Average snowy days | 10.4 | 7.1 | 7.5 | 4.9 | 0.5 | 0 | 0 | 0 | 0.1 | 4.4 | 9.8 | 10.4 | 55.1 |
| Average relative humidity (%) | 72 | 68 | 61 | 54 | 56 | 70 | 79 | 81 | 72 | 63 | 69 | 73 | 68 |
| Mean monthly sunshine hours | 161.3 | 198.7 | 240.5 | 229.9 | 244.2 | 241.2 | 230.2 | 220.0 | 212.2 | 185.5 | 155.6 | 137.8 | 2,457.1 |
| Percent possible sunshine | 60 | 69 | 65 | 55 | 51 | 50 | 48 | 50 | 57 | 56 | 58 | 55 | 56 |
| Source 1: China Meteorological Administration ||||||||||||||
| Source 2: Weather China ||||||||||||||

## Administrative divisions

There are two towns and nine townships in the county:
Towns:
* Sunwu (孙吴镇), Chenqing (辰清镇)
Townships:
* Xixing Township (西兴乡), Yanjiang Manchu Township (沿江满族乡), Yaotun Township (腰屯乡), Woniuhe Township (卧牛河乡), Qunshan Township (群山乡), Fendou Township (奋斗乡), Hongqi Township (红旗乡), Zhengyangshan Township (正阳山乡), Qingxi Township (清溪乡)

## Transport

* China National Highway 202
* Beihei Railway