WASHINGTON, March 29 (Reuters) - The Biden

administration on Friday revised rules aimed at making it harder

for China to access U.S. artificial intelligence (AI) chips and

chipmaking tools, part of an effort to hobble Beijing's

chipmaking industry over national security concerns.

The rules, released in October, seek to halt shipments to

China of more advanced AI chips designed by Nvidia ( NVDA ) and

others as Washington cracks down on Beijing over concerns its

advancing tech sector could help boost China's military.

The new rules, which run 166 pages in length, go into effect

on Thursday. They clarify, for example, that restrictions on

chip shipments to China also apply to laptops containing those

chips.

The Commerce Department, which oversees export controls, has

said it plans to continue updating its restrictions on

technology shipments to China as it seeks to bolster and

fine-tune the measures.