The Yan gold industry
The Yan gold industry was known for its perfect popularity in the whole city, they operated in any form of marketing business techniques, most especially their marketing structure moved in line in a monopoly form, whereby they never cared about competition or never even had any competitors with other gold companies marketers, instead their company pricing techniques could be higher or lower at any time they want.
The Yan gold company never engaged in any form of advertisement or any other stuff to promote their business, instead, the quality of their gold product influences buyers, who are mainly the high-class people. Meanwhile, the lower class could not afford to buy such an expensive gold ring from the Yan company so they just drifted off to other companies that sell ingenuine gold products-- such a pity for the low-class people because businesses are meant for profit and not giveaways.