Which couriers did Zhongtong merge with?

Zhongtong, Tong Yuan, Shentong and Baishi merged. According to Nanfeng County Society, Nanfeng County Fast Bird Logistics Co., Ltd. and Nanfeng Village-to-Village Logistics Co., Ltd. merged to operate four express delivery companies, namely Zhongtong, Tong Yuan, Shentong and Baishi, and planned a three-level logistics transportation and distribution system at county, township and village levels, planned and laid out four logistics distribution lines, and built 90 express delivery stations and lines. The line takes the county town as the center, forming a petal-shaped line, realizing full coverage of township distribution outlets and delivering express delivery every month.