I am confused,what's the difference between "beta.freeCodeCamp" and "www.freeCodeCamp"

I found two versions of freecodecamp.and the content is also different,but something is similarity.:astonished:

thanks for your reply.Is there any method for me to synchronize the answer which I have done in the “www.freecodecame”,because I have applied another account for “bate.freecodecamp”.If there are no solutions.that’s ok.I can do them again.:blush:

The solutions in beta.freecodecamp.com are completely separate than freecodecamp.org. There is no direct link. If you have completed the solution in beta, then you can copy/paste your solution into freecodecamp.com and vice versa.

ok.thank you so much.