(2) The four seas have the same sound and become one.
(3) Popularizing Putonghua is a family.
(4) Speaking Mandarin well is convenient for you, me and him.
(5) Mandarin goes with youth, and civilized language goes with fashion.
(The answer is not unique)
Knowledge contest slogan _ knowledge contest slogan is domineering and rhyming;
1. Go all out and make achievements on the field.
2. According to scientific manag