How to fly to "Longxuan Palace" in "The Legend of Ancient Swords"?

You can’t go there in the early stage, but you can go there after you come back from Purple Banyan Forest Fire. After you come back from Youdu, Longxiao Palace will be closed again.

Guidelines about Dragon Palace:

All the treasure chests in Dragon Palace are shell-shaped and well hidden, so please look for them carefully.

Treasure chests on the top floor: (Hanshi Powder 1, Fu Yuan Powder 1) (Purple Yang Pill 1) Shuimingxuan Guest Room (Huayumantian 1).

Bowen Guangji: Baijiaosha (Peach Blossom Fish).

Side mission: Bagua Tianxia (there is a Yao Ji Mingqing on the top floor of the Dragon Palace who asked someone to help send a copy of "Penglai Old News" to Yao Ji Feier on the lower floor. Feier's location is directly below the lower floor) A person is talking to a man below the spiral staircase. Please refer to the map of the lower level of Longxuan Palace for details).

Reward: Shell Collar.