The Trump administration plans to put a number of Chinese chipmaking companies on an export blacklist, but some officials want to delay the move to avoid hurting efforts to strike a long-term trade agreement with China.

The commerce department has compiled a list of Chinese companies — including China’s memory chipmaker ChangXin Memory [CXMT] — to add to the “entity list,” according to five people familiar with the matter.

Several of the people said the Bureau of Industry and Security, the commerce department arm that oversees export controls, had drafted a list that also includes the subsidiaries of Semiconductor Manufacturing International Corporation, China’s biggest chipmaker, and Yangtze Memory Technologies Co, its largest memory chipmaker. SMIC and YMTC are already on the list.