That governmental decision was surely not taken lightly, it's a significant move with high risk of increasing geopolitical tension...
The Chinese propaganda machine is already making lots of waves about how NL is no longer a democracy and how this dings NL reputation abroad.
The Dutch have put restrictions on Wingtech to not make certain changes (sale or move of assets, intellectual property, company activities, employees) for a year. That should give you enough to chew on I think (and it is public knowledge). Specifically the IP and assets bits are in focus here, more so because the parent company is on a watchlist. Note that they not only kicked out the CEO - which in itself is an earth shaking move for a company this big - they also took control over the shares.