From the first explorations into early Chinese civilisations, the Central Plains bordering the Yellow River have held centre stage. But the balance has now shifted to the Yangtze River and Sichuan. In 1985, two large pits were discovered within the walls of Sanxingdui, dating back to about 1200 BCE.
Over the past four years, more have been identified and their excavation is akin to space exploration, the masked diggers in space suits suspended on hydraulic platforms.
I was speechless when able to witness, at first hand, the bronze shaman king standing more than 3m, his arms once holding, probably, an elephant tusk.
There are highly decorated vessels, human figures holding altars, birds and snakes, a host of weird human masks. And the bronzes are but a prelude to more, for down deeper, there were jade ceremonial blades, daggers and discs. And to cap it all, there are golden human masks and tigers.
Whatever was the purpose of these sacrificial pits? We spent two days probing possibilities. The city was walled and, within, there was a palace area and zones set aside for jade workshops.
As if Sanxingdui were not enough, our field trip yesterday proceeded to its successor city. Jinsha is located in a suburb of Chengdu and the area excavated was colossal.
The five exhibition halls of its treasures culminate in a sacred golden disc with four heavenly birds flying round a sun of 12 rays. So precious, it is one of only 148 artefacts that must never leave China.
But I leave with a debt of gratitude that can never be repaid.