Wusu (simplified Chinese: 乌苏; traditional Chinese: 烏蘇; pinyin: Wūsū; also known as Usu) is a county-level city with more than 100,000 residents in Xinjiang. It is a part of Tacheng Prefecture of Ili Kazakh Autonomous Prefecture. Wusu is a city, where oil-production is a major part of the economy. Wusu is an oasis in Dzungarian basin. Wusu is between the major cities of Bole and Shihezi in Northern Xinjiang and west of Urumqi and Kuitun, south of Karamay.