Through what modern country or countries do the yellow and yangtze rivers flow?

The Yellow and Yangtze Rivers flow through the People's Republic of China.

Explanation:

-The Yangtze River is the longest river in Asia, and the third longest in the world (only surpassed by the Nile and the Amazonas). It is approximately 6,380 km from its source in the Qinghai region, to the sea near Shanghai.

-The Yellow River is the second longest river of the People's Republic of China. It is 5464 km long; only the Yangtze river is longer. It ranks sixth among the world's rivers in length.

The source of the river is found in the Bayanhar mountains in Qinghai province, 4500 meters above sea level. It flows eastward through seven provinces and two autonomous regions: Qinghai, Sichuan, Gansu, Ningxia, Inner Mongolia, Shaanxi, Shanxi, Henan, and Shandong. Its estuary is in Dongying, Shandong, where it flows into the Bohai Sea.