Board Thread:Chinese VOCALOID discussion/@comment-7882956-20180213034604/@comment-34635003-20180316215731

wish I could help source source this more. I know someone who was involved in making Haiyi, but they said that that what engine it's on is top secret. I believe that's equivalent to the "'Also, judging from a snapshot taken from the online chat room," discussed above. '

All the English side confirmation that Haiyi is 1. a private bank, 2. not for vocaloid engine seems sourced from the VNN tumblr link.