In Shenzhen, meanwhile, Astro-century Education & Technology Co. is the best performer on the city’s exchange this quarter, with Guomai Culture & Media Co. and Tangel Publishing Co. also in the top five.
China’s craze for artificial intelligence companies is supercharging the shares of some of the nation’s little-known publishers.
China Publishing & Media Ltd. is the biggest gainer on the Shanghai Composite index this quarter, extending this year’s advance to more than 200%. Three similar firms — China Science Publishing & Media Co., Southern Publishing & Media Co., and Changjiang Publishing & Media Co. — are also among the top 10 best performers on the Shanghai bourse since the start of April.

