Your four-day trip is too tense, and Zhenyuan, Seven Small Arches and Huangguoshu are located in the east, south and west of Guiyang, so the traffic back and forth is enough. It is suggested to remove Seven Small Arches. Although its waterscape is beautiful, it inevitably overlaps with Tianxingqiao scenic spot in Huangguoshu, so you can go there again later.
D1: After arriving in Guiyang at noon, go to Kaili in the afternoon, then transfer to Xijiang Miao Village, stay in Miao Village at night and watch the night scene.
D2: Visit Miao Village in the morning, then go to Kaili and take the train to Zhenyuan. Arrive in the afternoon, visit the ancient city, watch the night sc: took the train to Anshun early, arrived in the afternoon, then took a bus to Huangguoshu, visited the steep slope pond and Tianxingqiao scenic spot (you must go in the second half), and lived outside the Great Waterfall scenic spot.
D4: visited the Great Waterfall Scenic Area in the morning and returned to Guiyang at noon. In the afternoon, he had time to visit Jiaxiulou and Qianling Mountain and return to Guangzhou.
This trip is relatively reasonable, taking care of the night scenes of Xijiang River and Zhenyuan. Although there is still some rush, at least you can have fun.