The word "lock" in Shangque is well used. Tell me where it is.

The beauty of lock words: in the aspect of writing scenery, it renders a sad atmosphere; In lyricism, it mainly expresses the author's lonely and painful feelings locked in the deep courtyard. A word "lock" expresses lonely people, lonely hearts, homesickness and hatred of national subjugation to the fullest. It's not just the phoenix tree that is "lonely", even the sad autumn scenery will be "locked" in this high wall and deep courtyard. And it's not just autumn scenery in this yard who is "locked". Down-and-out people, lonely hearts, homesickness and hatred of national subjugation are all locked in this high-walled and deep courtyard. This situation cannot be described by a sad word. A word "lock".