I've never used huawei devices, so maybe all my information here will be nonsense, but just quick answers from mr. Google.
Bu we have more posts on thwack, so maybe it's not so easy as I assume. See Re: Can I use NetFlow Traffic Analyzer to monitor huawei 's netstream protocol?.
Can you please post here short PCAP with huawei netstream? I would like to analyse it. If they are compatible with v9 as they claim, then they maybe use only different template fields which we require for processing.