Chinese Gold Bar cipher

A group of seven gold bars which have pictures and text in Chinese, script and cryptograms which appear to represent certificates relating to a deposit with a US bank in the 1930s.
Further information including images of the scripts and pictures can be found on the International Association for Cryptologic Research site (The Cipher Foundation) here and the Cipher Mysteries page here - which has some discussion on the subject, and here. There are a number of other webpages on the subject, many of which repeat more or less the same information.
Their current location is unknown.
Category:Ciphers
Category:20th century