This is the 3648th most frequent Chinese word.
精华
"精华" means "essence" or "quintessence."
Here, '精华' refers to the 'essence' or 'most important part' of the book, highlighting its key or valuable content.
这本书的精华部分值得反复阅读。
The essence of this book is worth rereading.
In this sentence, '精华' is used to describe 'serum,' a concentrated external-use liquid product for health or beauty purposes.
面膜中的精华液滋润皮肤效果很好。
The serum within the facial mask has a great moisturizing effect on the skin.
'精华' here symbolizes the 'core value' or 'key attribute,' emphasizing the fundamental qualities of the company.