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I usually agree with John, this time too. Really similar, but different.
And if it is Lispe (99%), than it is L. pygmaea, compare with https://diptera.info/photogallery.php?photo_id=8978
Zhejiang China is at 30N, winter time. I collected L. pygmaea in Beijing, in Egypt, in Ethiopia (at 11.325N 39.688E). L. pygmaea comfortably lives in Hawaii. Oahu. Why not in Zhejiang China???