Port of Shenzhen(Chiwan) Position : 22°28'55" N 113°54'25" E  located in the mouth of Zhujiang River east coast , west part of Shenzhen city.  Channel : depth / 10.6 meters; length / 0.43 seamiles.  Temperature : annual average 24.8°, the highest temperature is 38.7°C and the lowest is 0.2°C..  Wind : wind direction more from the southeast.  Precipitation : annual precipitation is 1578.4 mm .  Ice : ice-free-port.  Fog : annual average 12 days, normally occured in spring and winter.  Hydrology : tide difference is 3.44 meters, rising tide speed 0.78 meters per second, ebb tide speed 0.75 meters per second.  Hinterland : Shenzhen city and parts of Guangdong province.