C418 guesswork

Wang Ruoan told Mo Xiyan, the right to trade is the right to freely enter and exit the nations.

Because such power was too tempting and too dangerous.

As a result, every year, Grand Xia Chu would choose a country to pay tribute to, and during the tribute ceremony, they would decide who would have the authority to do business this year.

This system has been in place for more than a decade now