The chairman of China's Huawei, Guo Ping, says the company doesn't 'do bad things' as U.S. President Trump maintains pressure on the company and the Chinese economy with tariffs and attempts to prevent other nations from buying Huawei's products.

"To build a system that we all can trust, we need aligned responsibility, unified standards and clear regulations," Huawei's Guo Ping declared at the Mobile World Congress in Barcelona, Spain today.

"We can proudly say that 5G is safer than 4G. As a vendor, we don't operate carriers' networks and we don't own carrier data," he added.

"Our responsibility (and) what we promise is we don't do anything bad — we don't do bad things," Guo said.

Western intelligence agencies have reported the Chinese equipment is massive, global surveillance project and the equipment's security is compromised.

"Here, let me say this as clear as possible, Huawei has not and will never plant backdoors. And we will never allow anyone to do so in our equipment. We take this responsibility very seriously.

"The U.S. security accusation on our 5G has no evidence — nothing. The irony is that the U.S. cloud act… allowed their entities to access data across borders.

"So, for best technology and greater security, choose Huawei. Please choose Huawei, thank you."