What time is the latest for Tongren No.6 bus?

Tongren no.6 bus, 22 o'clock at the latest and 6: 40 at the earliest. According to Baidu map, we know the return route: Dongshan Hotel (starting point) → Agricultural Bank (crossing Dongshan Bridge) → First → Dongshan → Grand Cross → Binjiang Park → Health School → Huaguoshan Square 1 Station → Construction Building → Liangshuijing → Regional State Taxation Bureau → Second Medical College → Regional Transportation Bureau → Mobile Company → Baoxin Hotel → Experimental Middle School → Jianghua International → Railway Station 2.