中国（zhōng guó) means China.
中文（zhōng wén) means Chinese language.
中（zhōng) means “middle” “central”; 国（ guó) means “country” “kingdom”. so 中国（zhōng guó) actually means “Central Kingdom” as ancient Chinese people believed that China was located in the center of the world.
文（wén) means “language”. 中文（zhōng wén) therefore means language of China– Chinese.
These are the two important words for anybody who starts to learn Chinese language. Here are three clips showing how to write them in the right order.