This is the 2150th most frequent Chinese word.
开国
"开国" means "founding a nation" or "establishing a country."
In this sentence, '开国' is used to describe the action of founding a nation or dynasty, referring specifically to its initial establishment.
明朝的开国皇帝是朱元璋。
The founding emperor of the Ming Dynasty was Zhu Yuanzhang.
Here, '开国' refers to the period of initial establishment of the country, highlighting the historical context.
这本书详细讲述了我国开国时的历史。
This book details the history of our country during its establishment.
In this example, '开国' is associated with the formal event marking the establishment of a nation.