In a change of marketing strategy popular Chinese flash and radio trigger manufacturer Shanny have decided against providing ongoing compatibility support for YongNuo and other third party products.
Shanny now preferring to concentrate development time on their own product range and ongoing Canon and Nikon compatibility.
Shanny may not have actually previously pledged a commitment to ongoing support for third party products, though current compatibility with the YongNuo YN-622C had been described as a feature of a number of their flash models (and discussed widely in the reviews etc on this site).
With the recent situation of YongNuo updating 2015 YN-622C units, leaving the current Shanny SN600SC flashes no longer compatible, Shanny have now made a clear decision not to spend time chasing compatibility with other continually changing third party products.
In practice there will likely still be compatibility between the 2 brands in many situations. Its just that you would be mixing these at your own risk, and Shanny will not take responsibility for any issues or bugs found when combining other third party gear.
(Which is much the same situation with other third party brands already).
Shanny will be informing their dealers that they now only provide compatibility support for original Canon and Nikon products.
Shanny – Flash & Trigger Models
Shanny – Website