The Biden administration is considering blacklisting a number of Chinese semiconductor firms linked to Huawei Technologies after the telecom giant notched a significant technological breakthrough last year, people familiar with the matter said.

Such a move would mark another escalation in a U.S. campaign to ringfence and curtail Beijing’s AI and semiconductor ambitions. It would ratchet up the pressure on a Chinese national champion that’s made advances despite existing sanctions, including producing a smartphone processor last year that many in Washington thought beyond its capabilities.

Most of the Chinese entities that could be affected were previously identified as chipmaking facilities acquired or being built by Huawei in a presentation by the Washington-based trade group Semiconductor Industry Association, according to people familiar with the matter. No final decisions have been made, the people said. Bloomberg News first reported about SIA’s presentation in 2023.