Tā de sīxiǎng tài lǎogǔdǒng le, gēnbushàng shídài.
His thinking is too old-fashioned; he can't keep up with the times.
Tips
usage
When referring to people, 老古董 is mildly humorous and teasing rather than deeply insulting. It's often used to describe someone who resists new technology or modern ideas.
