by Xinhua writer Guo YifanNANNING, Sept. 22 (Xinhua) -- Though the hibiscus-shaped roofline still stretches into the September sky, the faces beneath it continue to change. This is my eighth autumn at the gates of the China-ASEAN Expo. For over two decades, the expo has continued to evolve as China and ASEAN deepen ties and expand cooperation areas. Attending an AI expert salon, I was delightfully surprised to see representatives of many of China's leading AI companies. Isn't this, in itself, a testament to the close exchange environment between China and ASEAN?