My understanding is that Guo received financing from local PRC bosses to expand AIVI - so he doesn't need the money right now.
He spent hundreds of thousands of dollars to stay SEC compliant, and the share price still took a dive - so he's waiting in my opinion to come back with indisputable numbers that won't be denied.
At the time, AIVI was hurt deeply by the bad rep many Chinese stocks were getting in the market - even though his financials were audited by Friedman, even though he was showing good gains, even though he was ramping up to turn his business into a mini Foxconn.
He'll be back if he determines that it's a good time to re-enter the US market. As I noted before, he's sunk too much money imo to just stay away.
And based on other DD, it's shown he's not as interested in financing upcoming projects through HK - so the US is the best option and the cheapest, plus he owns a majority of the shares.