China has expressed its disappointment in the UK’s decision to ban Huawei and said there will be a cost.

The UK initially decided to allow Huawei to participate in its 5G networks in a limited role, despite US pressure to ban the Chinese firm. US officials have accused Huawei of being a threat to security. Even though the UK did not initially ban Huawei, it implemented rules to keep the company’s equipment away from sensitive locations, such as nuclear sites and military bases. In addition, Huawei equipment could not be used on the core network and could not comprise more than 35% of the network.

After increased pressure, including sanctions that cut Huawei off from chipmaker TSMC, the UK reversed its decision. According to the BBC, China has wasted no time expressing its displeasure.

“The UK side has used groundless risks as an excuse to co-operate with the United States… violating the relevant commitments made by the UK,” said Foreign Ministry spokeswoman Hua Chunying.

“Any decisions and actions must come at a cost,” she added.

Given the UK and China’s trade relationship, further escalation could hurt both countries. Only time will tell what Ms Hua meant, and what any “cost” might entail.