With so much concern over declining ethics in modern society, many fondly recall Li's advocacy of the so-called "Sixth Ethic" movement, with its emphasis that a new society needs a new spirit of morality and order.
當大家為現代社會倫理的解體而憂心，就有許多人想起他曾經倡導「第六倫」運動，強調新時代應有新的道德精神與秩序。