Trademarks are not necessary when selling stationery on AliExpress, but having a trademark can help you build brand recognition, increase the value and competitiveness of your products, and protect your intellectual property. A trademark can distinguish your products from other brands in the market, making it easier for consumers to remember and identify your products. In addition, having a trademark can also prevent other merchants from selling similar products without authorization, protecting your business interests. Therefore, if you hope to establish a trustworthy brand image on AliExpress and protect your intellectual property, it is recommended that you consider registering a trademark.