尽管不少入境游客在中国收获颇丰，但服务仍有提升空间。一些游客反映，跨国售后存在不便。部分商品保修范围仅限中国大陆地区，若需退换或维修，要自行承担较高的国际运费，还面临周期较长、沟通成本较高等问题。
I made several diagrams for concepts, such as:
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Sellfy Review: Pros and ConsSellfy has its benefits and downsides, but fortunately, the pros outweigh the cons.
Over the years, Android has evolved into a critical piece of technological infrastructure that serves hundreds of governments, millions of businesses, and billions of citizens around the world. Unilaterally consolidating and centralizing the power to approve software into the hands of a single unaccountable corporation is antithetical to the principles of free speech, an affront to free software, an insurmountable barrier to competition, and a threat to digital sovereignty everywhere.