It was for about 92 years.
22 years
Tributary systems helped China to become a great sea power under Song leadership.
There are 4 seas that border the country of China. They are the Korea Bay, the Yellow Sea, the South China Sea and the East China Sea.
The seas that are on the East of China include the Yellow Sea, the East China Sea and the South China Sea. All of these are the major seas that border China.
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China is near the East China Sea and the South China Sea.
the South China Sea
The South China Sea The East China Sea The Gulf of Tonkin The Yellow Sea
China is not located near the Mediterranean Sea. The country of China is bordered by the East China Sea and the South China Sea.
South China Sea
To demonstrate China;s Power and demand tribute from the western "barbarians."