Conversation so far:
who standardized the written script coinage and axle width in china
To unify the empire, Emperor Qin Shi Huang instituted reforms and models, such as standardizing the written script, coinage and axle width, which improved the road system.
how long did emperor qin shi huang rule
Qin Shi Huang ruled until his death in 210 BC during his fourth tour of Eastern China.

Question: who was the emperor before
Self-contained rewrite: who was the emperor before qin shi huang