2022.12.14-12.17National Exhibition and Convention Center(Shanghai)https://en.dentech.com.cn/?gclid=Cj0KCQjwsrWZBhC4ARIsAGGUJupCrfj0IzV1nKYw0vGLKT58kt4faMpjeV5lKaxBQucnuml8VnHYjv0aAkikEALw_wcB