Staffers remote control robotics to demonstrate working on power grid control units during a media tour at Guangdong Power Grid Robotics Laboratory in Guangzhou, Guangdong Province, April 16. AP-Yonhap

Korean investors have increased their exposure to China's technology and advanced manufacturing sectors during a recent pullback in mainland China stocks, suggesting continued appetite for artificial intelligence (AI) and hard-tech themes despite broader market weakness, according to market analysts on Monday.

They turned net buyers of several China-focused exchange-traded funds (ETFs) and technology stocks on Thursday, when mainland Chinese markets saw a notable decline. The buying was concentrated in products tracking robotics, semiconductors power-grid equipment and electronics supply chains. The investors also accumulated ETFs tracking China's technology and innovation themes, including products tied to China's STAR Market.

They bought a net $3.21 million worth of the China Asset Management Co Robot ETF during the market sell-off, according to data from SEIBro, a portal maintained by the Korea Securities Depository.

That was followed by Shenzhen Fastprint Circuit Tech, a leading Chinese printed circuit board maker, with net purchases of $2.73 million, and Guangdong Fenghua Advanced Technology, one of China's leading electronic component makers, with net purchases of $2.72 million.