1N-COUNT 财宝箱 A treasure chest is a box containing treasure. 财宝箱
2N-COUNT (为某物提供丰富来源的)百宝箱 If you describe something as a treasure chest of a particular thing, you mean that it is very good source of that thing. (为某物提供丰富来源的)百宝箱
This book is a treasure chest of information. [+ of]