The world will never forget China's 1989 crackdown on pro-democracy demonstrators in Tiananmen Square, Taiwanese President Lai Ching-te and US Secretary of State Marco Rubio said on the event's 36th anniversary. "The commemoration...isn't only to mourn history, but also to perpetuate this memory," Lai added. On June 4, 1989, Chinese troops opened fire on students to end the protests.