What did Xi monopolize in Jiangnan Bai Jing?

What is the answer for the Xi family to monopolize the scenery in the south of the Yangtze River? Players can operate Huizhou merchants and sell various resources through the building of the parliament hall. Selling resources can increase market share, and when the market share reaches 90%, monopoly can be achieved. After the monopoly of resources, new old shops can be unlocked, and the income from selling such resources will be higher. By operating Huizhou merchants, players can enhance their family reputation and earn a lot of copper coins, family funds and Huizhou's new resource "gold foil"