He is immersed in the study of Tang-Song phonetics.

He cut the paper using his new scissors.

There is a beautiful Chinese quince tree in my garden.

He is deeply interested in the study of Tang music.

I am planning to go to Inner Mongolia, an autonomous region of China, next week.

I have been to Outer Mongolia.

I have been to Chicago.

The Paleogene period was a very important time in the history of the Earth.

The government is considering increasing the surcharge on imported foreign products.

Japan has introduced an import quota system to protect domestic industries.