hi, i want to go tomorrow Longqing gorge ice and snow festival and back same day.

Well, since you didn’t tell your exact location, I can just tell you the route from People’s Court of Fengtai District.
You can walk to the northeast to Qilizhuang and take subway line 9 there to Baishiqiao South. After arrival, walk northwards to take bus no. 27 to Deshengmen, and then take bus 919 fast to Yanqingnan Caiyuan, and then transfer to bus y15 to reach.
The distance between is about 66.5 mi, it needs at least 4 hours to reach.