Cheating?

I am no legal expert but I think that is the gist of it:

The European Union is set to launch a major trade case against China's biggest telecom equipment makers, arguing that they have benefited from illegal government subsidies, the Financial Times said.

The EU told member states it had been gathering evidence for an anti-dumping case against Huawei Technologies Co Ltd and ZTE Corp, saying that they had obtained illegal government subsidies and sold products in the EU below cost, the newspaper said, quoting unidentified EU officials and executives.

Once the EU determined that China was acting illegally, Huawei and ZTE, the world's No.2 and No.5 telecom equipment makers, could be subject to punitive EU tariffs, the FT said. ...

China is the European Union's second biggest trading partner after the United States and the bloc is China's biggest trade partner, with trade between the two forecast to hit a record high of 500 billion euros ($397 billion) this year.

But the relationship is tense. De Gucht has in the past complained that China subsidies "nearly everything", making it hard to compete.

That's not the only thing wrong with Huawei.