HRBN - just to reiterate:
All things considered, I think the probabilities say that HRBN is legit, at least legit enough to justify the current stock price (any time you look closely at anything, you will find some discrepancies between what is reported and what is actual per GAAP, especially in China--but I think that's understood and accepted by all parties).
What I would like to see, and what I think would solidify this play DD-wise is,
1) A competitor that has exposure to high-speed rail and that has somewhat similar gross margins to HRBN.
2) HRBN's SAT filings. Their SAIC filings do not match (that's already been confirmed).