Leng Yan just nodded after hearing this, and on the way to Tongcheng, Leng Yan seemed to be thinking about things the whole time.

Leng Yan connected all the things Qin Du told her. From what she saw so far, it seemed that Qingyu sprinkled a kind of powder on Zhao Anran when she met her, and Gong Cang put a poison on another disciple to make that disciple obey his orders, and also sprinkled powder on that disciple.

Finally, when the two disciples passed by her, they got some of the powder on her clothes. The mixture of the two powders became a medicine that caused her old illness to flare up early. She didn't pay any attention to it at the time, and so at night she inhaled a certain amount, causing her old illness to flare up.

Leng Yan's intuition told her that her guess was wrong, but she couldn't remember what was wrong.

It wasn't until she arrived in Tongcheng that Leng Yan suddenly had an idea and realized where she went wrong.

The direction of her investigation was wrong from the beginning. How could Qingyu and the others leave such an obvious handle? So her guess that Qingyu and the others used other people to drug her was wrong. Putting aside other things, she has been immune to all poisons since birth, including Gu. Qingyu and the others also knew it. How could they make such a stupid mistake?

So everything Qin Du found out was deliberately let Qin Du find out by Qingyu and the others.

Now it seems that there is only one possibility, that is, Qingyu and the others have tampered with the magic weapon given to him. Thinking of the magic weapon they gave him, Leng Yan subconsciously pinched the earring on his ear. Then Leng Yan tried to input a little spiritual power into the earring, but found that the earring had been replaced.

Now that the clue is gone, Leng Yan has to start from other places if he wants to investigate.

At this time, Leng Yan heard Xing Luo calling her. Leng Yan came back to her senses and looked at Xing Luo, only to see Xing Luo smiling at her.

Afterwards, Leng Yan saw a sword energy coming towards Xing Luo from behind. Leng Yan was startled and immediately pulled Xing Luo behind her. The next second, the Hanyue Sword was unsheathed, and the sword energy swept across, instantly breaking the oncoming sword energy, and then slashed towards the person who attacked.