What are the highlights of the eleven-character Spring Festival couplets?

Six pairs of eleven-character Spring Festival couplets, please refer to them!

1. First line: Socialism is like a thousand-year-old pine; second line: The construction of the four modernizations is like a fountain of happiness for all generations.

2. The first couplet: Celebrate a good year, celebrate life, and celebrate the prosperity of thousands of families; the second couplet: I wish the country peace, prosperity for the people, and prosperity for all industries.

3. The first couplet: Thousands of miles of mountains and rivers are especially magnificent during the New Year; the second couplet: Through the ages, people are more energetic in prosperous times.

4. The first couplet: The earth is shining, and spring is eternal all over the world; the second couplet: China is rising, and Kyushu is enjoying endless joy.

5. The first couplet: Hundreds of birds are chirping, singing the Spring Festival song in unison; the second couplet: Thousands of flowers are in full bloom, and the splendor depicts a picture of the world.

6. The first couplet: The birds sing and sing, happy words about last year's happy events; the second couplet: The dragon and the tiger leap, smiling to celebrate this year's happy spring.