Are both Karamay and Meihekou transportation hubs?
Karamay Karamay or Kelamayi is a prefecture-level city in the north of the Xinjiang Uygur Autonomous Region, People's Republic of China. The name of the city comes from the Uyghur language, and means "black oil", referring to the oil fields near the city.
G4 Beijing–Hong Kong–Macau Expressway The Beijing–Hong Kong–Macau Expressway (), commonly referred to as the Jinggang'ao Expressway () is a 2272.65 km that connects the Chinese cities of Beijing and Shenzhen, in Guangdong province, at the border with Hong Kong. The expressway terminates at the Huanggang Port Control Point in Shenzhen, opposite the Lok Ma Chau border control point in Hong Kong. The connection to Zhuhai at the Macau border is made using the spur line G4W Guangzhou–Macau Expressway, which branches off from the main line in Guangzhou. When the expressway was completed it was China's first completed north-south expressway route.