"Nobody knew me and my English was not very good. But I had great fun there," says Liang.
The song, Boy, is about a girl he met in San Francisco.
Sunset Boulevard was where he visited often, especially the instrument shops. There, he watched unknown artists perform on streets.
Meanwhile, Liang has dedicated the song, Soul Singer, to an African-American street singer he met there. "I don't know his name but called him 'chief'," says Liang.
"He took me to dinner and taught me about soul music."
"He didn't sing for money or fame. He sang because he had a passion for music. That's why his music is so touching," says Liang. "I want to be a singer like him."
"I am a person who is not good at handling fame. So, I just do it at my own pace," he adds.
Born in Changchun, Jilin province, in Northeast China, Liang wanted to be a singer-songwriter since he got his first guitar at 12. It was a birthday gift from his mother.
He says that he has been ready for the music industry for years.