how to go to Hukuo waterfall from xian by bus on 9 September 2019? and back to xian next day. Thank

There are two direct buses from Xi'an to Hukou waterfall. One departs at 12:00 am from Xi'an north bus station. Another one departs at 6:50 am from the East Gate of Shaanxi Provincial Stadium. From Hukou Waterfall to Xi'an, there is also direct buses depart at 8:00 am and 1:00 pm everyday from the entrance of Hukou Waterfall scenic area.