In 1987, the unearthed of posy on coffin of Han Dynasty shows that the founded time of Luzhou can be backdated to.

Although Han period pictorial stone coffins have their special local features, they share the common religious belief with other Han stone carvings in their main contents.

The successive discoveries including the ancient relic cities on the Chengdu plain, the jinsha Relic and the large pirogue coffin relic have traced the urban civilization up to 4500 years.

Primary Research on mtDNA from Enshi Cliff Coffin;