This is the 7868th most frequent Chinese word.
青海
Qinghai: A province in northwest China.
In this sentence, '青海湖' refers to the specific geographical location, Qinghai Lake, directly naming a notable landmark in the Qinghai province.
青海湖是一个非常美丽的湖泊。
Qinghai Lake is a very beautiful lake.
Here, '青海' indicates the name of the province in China, Qinghai, emphasizing it as a destination for travel.
她往青海旅行了两次，收获了难忘的回忆。
She has traveled to Qinghai twice and gained unforgettable memories.
In this context, '青海' represents the overarching geographical and cultural region of Qinghai, highlighting its significance within China.