In 2001 a great early Shang(before 1000BCE) relic was found and scientific excavated in near chengdu city sichuan province southwest china. Many wonderful jade and stone and bronze and gold come out.
The attached pic is the jade beads from Jinsha relic, I can not find any more pics from different angle about the details of these beads.
But I personally think if they are not the same they must be close relatives with those in taiwan as shown above.