Lu Fayan’s Qieyun rime dictionary standardizes Chinese pronunciation
The Qieyun, compiled by Lu Fayan in 601 C.E., began as a dinner-party argument in Chang’an about how Chinese characters should be pronounced. Eight scholars from north and south disagreed; Lu spent the next twenty years synthesizing their debate into 12,158 characters across 193 rhyme groups. It remains our clearest window into Middle Chinese.






