onOver the years, Li Yusa has heard quite a few niche piano pieces. She can be sure that the melodies Ou Yan just played were never published on the market. There is a high probability that they were...and said, “Teacher, I'll go say hello and be right back.”"Well, busy yourselves." Ou Yan nodded. Seeing them walk away, she then took out her phone to reply to Si Yechen's message.Song Qiao Ying walk...