You can take bus No.4 to Xingyi 15 109. According to relevant information, the best bus route from Xingyi Ethnic Street to Tiankeng Scenic Area of Yubu Road is to walk from Ethnic Street 120 meters to get on the bus at Donghuan Road Station, take bus No.4, get off at Hongyuan Community Station after five stops, then get on the bus at Hongyuan Community Station, take bus 15 at Xingyi, and get off at Xiao (Fukang Campus) Station after five stops. Then get on the bus at 1 road station (Fukang campus), take the bus at 109, get off at the administrative office (Qingshuihe) station after passing the station at 2 1 road, and finally walk 7.9 kilometers to reach Yubulu Tiankeng Scenic Area.