I bought some overly salted Chinese food ( I did not know it at time) and took most of it home. Now I would like to get the salt out so i can it eat. Do you have any suggestions?
While Erlenmeyer flasks and graduated cylinders and food-science may not be able to save your leftovers, adding some cooked rice with fried egg (basically any fried rice recipe) will likely crowd out the saltiness of the base dish as well as extend your leftovers.
You cannot remove salt once it is in your food, so you either mix it with something else as @mfg says, or throw it away. I'd just chuck it and never grace that restaurant with your presence again.
Depending on how salty the food really is, you could attenuate it with something that is acidic (i.e. vinegars, citrus) but if it is really too salty to eat alone then you my friend are SOL unless you want to make Chinese leftover soup and dilute it with water.
There are several things to try. My favorite is to add sugar to the food. Also, you can rinse with warm water if you don't mind losing other flavors too. Stir frying with rice or noodles works too.
We accidentally added too much mountain seasoning to fried rice. So, we rinsed it with boiling water and that took the excess saltiness out without losing the flavors.