The Shanghai Composite fell 0.2% to below 3,950 while the Shenzhen Component dropped 1% to 13,250 on Monday, with mainland stocks declining for the third straight session as disappointing factory activity data dampened the outlook.
A private survey showed China's manufacturing activity slowed more than expected in October as Sino-US trade tensions flared up during the month.
Meanwhile, the White House announced over the weekend that China would suspend new export controls on rare earths and end investigations into US semiconductor firms, in exchange for the US pausing certain tariffs and scrapping a planned 100% levy on Chinese exports.
The move followed last week's landmark Trump-Xi summit aimed at stabilizing relations.
Tech and AI-related shares led the decline, with Zhongji Innolight, Victory Giant, and Wuxi Lead Intelligent losing between 2% and 8%.

Sumber : tradingview.com