If Jin Guang Yao dies then Wei Ying's injury will vanish. Wei Ying is staying at Lan Zhan's place because his brother allows them to stay until everything is figured out. Wei Ying figures out that Jin Guang Yao killed his older brother by changing the tune he played by a few notes. Wei Ying and Lan Zhan go up the mountain and find the kids trapped there. They are attacked by puppets and everyone has lost their spiritual energy. Wei Ying tries to figure out why and how it was done. Wei Ying and Lan Zhan save everyone from the puppets. (Source: jindreame at MyDramaList)