The whole city is United and warm in the south ... Help and teach (fill in an idiom or a four-word word that can correspond to the previous one) as a propaganda banner ~ ~ ~

People in the city are very enthusiastic, and people in Central and South China are teaching.

Qian Shan has thousands of waters, beautiful mountains and clear waters. It is clear and beautiful to enter the wasteland.

The level is like a mirror, surging and magnificent, and the microwave shines.