https://www.nhlpa.com/news/1-11975/n...-cba-extension
Looks like it was for the 2018 Olympics for a CBA extension to 2025. Presumably Beijing 2022 would have been included, too (because the league wants to be in China, assuming it isn't overcome by the Wuhan).
This could also be read as an indication that the league isn't
that opposed to the Olympics, but they obviously want some return on the deal (whether it's directly from the IOC or not)