With the rise of the market economy, Wang Shouyi Shisanxiang began to register the trademark in 1987, and then applied for a design patent. The small Shisanxiang product was immediately registered 5 trademarks. Later, Wang Yinliang, with his forward-looking vision, registered it with his father's image and name, and printed it on the packaging box. However, counterfeit products on the market are difficult to detect and are constantly being attacked. "Press the gourd and lift the scoop."

In 1993, Shisanxiang Group sued 10 condiment factories in the province for patent infringement for the first time to the Zhengzhou Municipal People’s Court in accordance with the Patent Law. The Zhengzhou Municipal People's Court made a ruling in accordance with the law: ordering the 10 defendants to immediately stop infringement activities, destroy all counterfeit products, and compensate for economic losses. Just after the lawsuit was won, at the end of 1993, more than 20 kinds of counterfeit Thirteen Incenses appeared in Henan Province. They were everywhere in Shangqiu, Nanyang, and Luohe, especially in the border areas of Henan and Shandong. Counterfeiters were engaged in guerrilla warfare and hide-and-seek in the dark.

In 1994, the Henan Provincial People's Congress passed the "Supplementary Provisions on Punishing Counterfeit Registered Trademarks", which strengthened the Shisanxiang Group's confidence in fighting counterfeiting. With the cooperation of the public security, procuratorate, law, industry and commerce and other functional departments, two large counterfeiting dens at the junction of Henan and Shandong were taken down in one fell swoop, and the counterfeiting criminals were brought to justice, becoming the first domestic counterfeiter to be sentenced. case. In order to protect the unique name and brand of "Thirteen Fragrances", relevant departments have given strong support.

In 2003, the China Food Industry Association and the China Condiment Industry Association issued documents stating that "'Thirteen Fragrances' has become a unique name in the field of condiments and a brand well-known to the public."

In 1999 and 2000, the State Administration for Industry and Commerce twice required the industrial and commercial departments of Shandong, Hunan, Guangxi, Guangdong, Anhui and other provinces to seriously investigate and deal with 20 products that were seriously counterfeited. In 2003 The Trademark Office of the State Administration for Industry and Commerce and the Trademark Review and Adjudication Board recognized "Thirteen Fragrances" as a specific name.

Since the 1980s, the Thirteen Fragrance Group has spent more than 20 million yuan on anti-counterfeiting, and has cooperated with law enforcement departments to investigate and deal with 96 cases of infringement of counterfeit production and sale. Currently, there are still infringements in the production of "Thirteen Fragrances" There are only 5 or 6 product manufacturers left in the country, and they are all workshop-style individual businesses.

No wonder Wang Yinliang said: "The development of Thirteen Incenses to this day is, to a certain extent, the result of the crackdown on counterfeiting, which saved the market from those who make and sell counterfeit goods." The crackdown on counterfeiting has protected Shisanxiang. The Sanxiang brand, more importantly, protects the interests of consumers and makes "Thirteen Fragrances" a product that the public can trust.