Will Hu Feixue in Heluo Heroes have a harem ending?

No. According to the query on the iQiyi official website.

1. There are three conditions for achieving the harem ending. The first is to conquer the three heroines in the map, namely Yan Yushu, Zhuan Sunning, and Bai Sun. The second condition is to pull Fill your own evil value, and finally choose the third option to kill yourself when you complete the ending of Wolf Ambition.

2. "Legend of Heroes of Heluo" is an open-world stand-alone game developed by Heluo Studio and published by Block Games. The game was officially released on October 23, 2018. In the game, Xiao Xiami, an alien who is dreaming of returning home, accidentally falls into the temple. Little does he know that all forces have already targeted him and will once again be left to the player's control.