How old is Yang Jiacheng?

Forty. According to Baidu Encyclopedia, Yang Jiacheng, 1983, born in Guangzhou, is 40 years old, a well-known education blogger and a star English teacher. At the age of five, he went to the United States with his parents from Guangzhou to study and live, and won the first prize in the New Island Chinese Singing Competition in San Francisco. After graduating from high school, he was admitted to the University of San Francisco, majoring in educational psychology, and made his debut in Taiwan Province Province with his idol dramas and solo albums.