1. When you explore the big world, you will definitely find a place in Mond where you can't go. There is a wind barrier. In fact, it is the site of Hong Long. In fact, there is no need to open the remains of Fenglong. In the third act of the preface, the main line will automatically let you run to that place.
2. The remains of Fenglong are in the sky. This place is very important, and players generally can't find it. There are three altars in the site of Hong Long. Find nine squares, and then you can open the ruins. Players of Fenglong Relics must reach 18 level to open it, and players can't enter before.