If you are in the scene long enough, you should have known that there are some uncooperative clients that always send 0% (Xunlei being one of the more notorious example with their VIP schemes, and later on they would straight up spoof their client string when people started blocking them). Being a leecher nowadays is almost a norm for a lot of users, and I don't blame them since they are afraid of consequences in a more regulated jurisdiction. But a must seed when leech requirement? Hoho no, that's more like a suggestion.
LINE is a communication software that is predominantly used in Japan, Taiwan, Indonesia(maybe others? South Korea?). It is clunky, buggy, files expire fast, can't upload for a lot of extensions, only login-able on 1+1 devices (phone+computer). And people still use it, also there is no avoiding it if you want to get anything official done around these parts. I do see youngsters using Instagram and Threads, and a bit of Telegram sprinkled here and there but that's it. You want to get the job done, you use LINE. It's THE communication app.
I had been using serverultimate on my phone for a few years, and recently limitations made the port binding not work anymore. Copyparty using termux on Android worked amazing!
I think you've mistook Kanji characters(Japanese) as Chinese characters, some chars are the same even in writing order, even though not shared in the same char codespace.