Does not belong. Because the cost of purchasing patented products already includes patent royalties, there is no need to pay a second time.
Legal basis: Article 69 of the "Patent Law" shall not be deemed to infringe patent rights if any of the following circumstances occurs:
(1) Patented products or direct production in accordance with patented methods After the obtained product is sold by the patentee or an entity or individual licensed by it, the product is used, promised to be sold, sold, or imported;