1. The first one is the first to explain, the first is the first to explain, and the first is clear and the person is clear.
2. Please speak Mandarin - the language of the Chinese people.
3. Speak fluent Mandarin to make your career successful.
4. Speak Mandarin well and communicate with the world without limits.
5. Speak Mandarin well and love my China; popularize Mandarin and let the world see China;
6. Language is a bridge of communication, and Mandarin is a solid pier.
7. Using Mandarin will make you look more graceful.
8. Mandarin is a bridge for smooth communication between you and me.
9. Speak fluent Mandarin and be a true Chinese.
10. We all speak Mandarin to communicate with each other; east to west and north to south, the family relationship is like a family.
11. Let youth be accompanied by popular language, and let knowledge join hands with civilized language.
12. We have the same ancestors, the same roots, the same voice, the same heart, the same Mandarin, and the same feelings about China.
13. Speak Mandarin and love the new China; bring the hearts of all people to build modernization.
14. Popularize the nine states and reach the whole world. Words are a good matchmaker and there is no obstacle in the heart.
15 Society is a family where everyone speaks Mandarin.