Is it illegal for merchants not to publish the winning list?

Legal basis: Several Provisions on Prohibiting Unfair Competition in Bonus Sales Activities.

Article 2 The term "sales with prizes" as mentioned in these Provisions refers to the behavior of business operators selling goods or providing services, and providing goods, money or other economic benefits to buyers. Include bonus sales that reward all buyers and lottery sales that reward some buyers. Anyone who decides whether the buyer wins the prize by drawing lots or shaking numbers by chance belongs to the lottery method. These Provisions shall not apply to prize-winning fund-raising and other lottery sales activities approved by the government or relevant government departments according to law.

Article 6 When holding a sales with prizes, an operator shall clearly indicate to the buyers the types of prizes, the winning probability, the amount or types of prizes, the time and method of awarding prizes, etc. For off-site instant lottery sales, the notice shall also include the time, place and method of drawing the lottery and the time and method of notifying the winners. The business operator shall not change the matters specified in the preceding paragraph that have been made clear to the public. For the prize-winning sales activities that draw a lottery immediately at the sales site, the operator shall make it clear to the purchaser at any time about the redemption of prizes beyond 500 yuan.