What color are the taxi companies in Nanchang, Jiangxi?

Nanchang Volkswagen Transport Co., Ltd. Jiangxi Volkswagen Transport Co., Ltd. Nanchang Taxi Co., Ltd. Jiangxi Changyun Taxi Co., Ltd. Jiangxi Xihu Taxi Co., Ltd. Nanchang Second Taxi Company Nanchang Third Taxi Company Nanchang Bus Taxi Co., Ltd. Jiangxi Eurasia Taxi Service Co., Ltd. Ye Nan Taxi Co., Ltd. Nanchang Hongyan Taxi Co., Ltd. Nanchang Jiahui Taxi Co., Ltd. Jiangxi Ebodi Taxi Co., Ltd. Nanchang Jin Rui Taxi Co., Ltd. Jiangxi Taxi Co., Ltd. Nanchang Wangxin Taxi Co., Ltd. Nanchang Oriental Travel Automobile Service Co., Ltd. Jiangxi Binjiang Taxi Co., Ltd. Nanchang Materials Taxi Co., Ltd. Nanchang Travel Automobile Service Co., Ltd. Jiangxi Zhongli Taxi Co., Ltd. Jiangxi Yiyou Industrial Development Co., Ltd. There are so many taxi companies that they can't even tell the colors, mainly red, green, yellow and blue.