Huawei is not only selling networking gear but quickly becoming an all-encompassing IT behemoth with only two problems to solve in order to be the one-and-only, neither of which will last forever: bad press in international markets and a too slowly growing (for Huawei's pace) internal market.
For nations that have seen the truth (US and Australia), they've rightfully limited their presence.
Currently the likes of IBM have only two clear paths: join ventures with Chinese companies (no other way to get into China), get the money today and hope for the better for tomorrow, or not going into China and just perish in ten to fifteen years -oh! and still letting go today's money to other companies that go with option 'A'.
There's a third option - survive by using a combination of influence over the US(to handle Door A folks) and business strategy to minimize the Chinese threat.