Shenqing Xuanqi Sword Formation

The Qi Instrument that flew out from Shen Lian was what he picked up by chance in the capital of Yue Tuo. It was from an antique shop called Zhixing Bookshop. The house owner was a middle-aged scholar. Shen Lian had a memorable impression of him. He was elegant and well read. He even tested Shen Lian's knowledge on the origin of the Qi Instrument. If Shen Lian could answer it correctly, he would give the item to him for free. Shen Lian obtained the item because he could answer him with ease.

The reason Shen Lian was willing to accept the Qi Instrument was that of its properties where 'it stays upright when it is half full; it will topple when it is full; it stays as Qi in the void.' It was quite mysterious, and could potentially help him to understand Dan Dao, the Dao of Elixir. Without awareness, he could not have understood the secret of Huandan when he was fighting Zhao Xiaoyu. Even if he could achieve Huandan, it would not be a comprehensive one.