CNX team announced in the roadmap, the project will swap the CHX ERC-20 token on the Ethereum blockchain to OWN main net.
So if you have ERC-20 CHX token, then you need to swap those for native CHX by 1st JUNE 2019 before its ERC-20 smart contract freeze.
If you dont how and where to do it, just checked the below link -
https://bitmaxhelp.zendesk.com/hc/en-us/articles/360021403293.
BitMax.IO came up with easiest way to swap ERC-20 CHX token for native CHX. There are detrailed steps mentioend in the above link/ article published by BitMax team.