The issue with the references is that they are not certified by a public notary or Justice of the Peace which is an essential requirement for all documents to be certified in the online application.
但是 reference letter 公证员告诉我是没法公证的,我给她看了样列,问她能不能 “证明扫描或复印件确实是原件的真实copy,” 在复印件上写上““this is the true copy of the original” ,公证员明确告诉我不行,并且告诉我上海的公证处都不会办理这样的公证