Conversation so far:
What happened at the early years of the Taiwanese band Mayday?
Shortly after participating in the Formoz Festival, the Taiwanese band Mayday began to actively send demo tapes to various record companies.
Why was the Taiwanese band Mayday sending out demos in their early years?
The Taiwanese band Mayday began to actively send demo tapes to various record companies in the hope of sealing a record deal. Their demo impressed Rock Records executive Jonathan Lee

Question: What happened after Jonathan was impressed?
Self-contained rewrite: What happened after Jonathan was impressed by the Taiwanese band Mayday's music?