I recall reading an article some time ago about an expert claiming that the pyramids in China and those in South America were built using the same construction techniques, and this has lead him to be convinced that they must have been built by the same people
Hmm. What was his expertise on, architecture or anthro? Seems like a dubious claim.
There's no knowledge what the pyramids of China were used for except that the Emperor Qin is buried in one. Other than that, they're pretty much a mystery. Also another note, virtually all of the pyramids in China are just human-made dirt mounds. The one Emperor Qin is buried in does have a structure underneath but wouldn't call it a pyramid according to what sonar images make it.
I recall reading an article some time ago about an expert claiming that the pyramids in China and those in South America were built using the same construction techniques, and this has lead him to be convinced that they must have been built by the same people