It is visible in the APNIC Labs measurement at 30% and within different AS of China Mobile at 65% or better, it depends province by provice, and provider by provider.
I don't call this abysmal at all. It very possibly is higher, there are reasons why APNIC may undercount, but noting that APNIC and Akamai tend to agree on their numbers.
Google's own numbers for China are far lower for reasons which do not affect the APNIC or Akamai data.
1. Most Chinese websites or apps don't work properly or at all in a pure IPv6 setting. They claim to be IPv6 compatible, but have a lot of problems (e.g. images not loading).
2. Most Wi-Fi networks (be it home WiFi, restaurant WiFi, hotel WiFi, school WiFi, etc.) have no IPv6 addresses. Half of the IPv6 enabled WiFi networks I've ever seen are set up by myself.
A lot of people, including young people, throughout Asia don't have computers. A large number of working adults our age (however old you may be) don't touch desktop or laptop computers at all on their day to day. A huge number of people only have phones in their home and only use phones for their work. Plenty of companies also use tablets with specialized apps in places where a western company would use a PC. Finding 20-30 somethings in Asia who are educated and employed who don't know how to use a mouse isn't uncommon. I've encountered it loads of times with new employees in various offices.
Virtually all of India is phones and tablets. It's the highest ipv6 economy. If your criterion is "not handheld devices" then I ask, what makes desktop computers so special?
I believe 80% or more of the planets internet is handhelds.
You think the US home users on comcast are all PC's?
More on the technical side. Most of mobile devices and their modems need (or even allow) zero to no manual configuration, so adopting ipv6 with these hardwares are easy -- the ISP just need to deal with their side.
This is in contrast to "fixed-line" internet devices like computers and their routers.
https://stats.labs.apnic.net/ipv6/CN
I don't call this abysmal at all. It very possibly is higher, there are reasons why APNIC may undercount, but noting that APNIC and Akamai tend to agree on their numbers.
Google's own numbers for China are far lower for reasons which do not affect the APNIC or Akamai data.