How does Gao evaluate Charlie as a singer?

Gao's exact words are like this? The magic sound between children's voice and female voice, a person's choir; Charlie's clean voice is rare in today's industry. Now everyone is wandering around, singing and playing with all kinds of things. It is rare that he is a quiet handsome man and sings quietly, so I have no resistance to his voice. ? Charlie is the only singer in the world, but you don't have to hesitate, because you have to think about it for a long time before becoming another singer, maybe because it comes from your own company or something, but Charlie is your ear. Hey, isn't it a loss to say that such a voice doesn't need to sing my song? Isn't it? Of course you like it. It's certainly fun to sing what I wrote in such a voice. This shows that Gao really likes Charlie, otherwise he wouldn't say so much.