Please help me answer the historical questions, thank you!

1, Xuanyuan unified the Chinese nation. He planted hundreds of plants and trees, vigorously developed production, began to make clothes, built ships and cars, invented compasses, set up arithmetic, made melodies and created medicine. Characters appeared in this period, and later generations regarded it as the ancestor of the Chinese nation.

2. Propagandize the concept of "one country, two systems", be a small messenger of cross-strait cultural exchanges, introduce Taiwan Province Province to people around you, and publicize the mainland to friends in Taiwan Province Province.

3. The predecessor of Han nationality is Huaxia nationality.

4. Yao Shunyu

5, Beijingers cavemen

6. Banpo Cultural Site in Xi City, Shaanxi Province. Stone tools and painted pottery are the daily necessities of primitive residents.

7. The Yellow Emperor