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The first one is called thornless lemon or thornless Orange lemon.無刺檸檬無刺香橙檸檬https://www.xn--hdst89am2b71ik9zca.tw/product-detail-900440.htmlThe second one is called papaya Orange木瓜柚 https://news.ltn.com.tw/news/life/breakingnews/3013634
And this is for sure citrus Ujukitsu… sweet lemon as they say
Very interesting! The first images remind me a citrus sold as Perfume Lemon/香水檸檬 (I left some info here) that last year I've found sold in Malaysia and it looks like is another variety from Taiwan, but now very extensively growth in PRC too. The biggest problem both in these countries is the language barrier and it's very hard to understand which variety is what, if you cannot read mandarin, furthermore as everywhere sometimes the names are a little generic.
So called Perfume Lemon is typical lemon from India. Assami lemon. https://assam-help.com/info/kaji-nemu/112/We discussed it in the past.गंधराज लेबू Gandharaj Lebu ,or Gandharaj Lemon.