the number one thing to remember about chinese food is that it was designed to be served family style. my local place to get takeout serves rice, a small rice, in a 22 oz container. the regular portion of ma po tofu [without the rice] comes in a quart container. if you bought a quart container of soup at the store would you assume that was one portion? while we tend to order our own "portion" of food, we're ordering our own portion of food that is supposed to be feeding four people. and that portion should be divided into quarters in order to get anywhere near an actual portion of food as it is supposed to be. i always figure that the total bit they give you with rice is going to run around 2000 cals. so if i eat 1/4 of that, that's 500 and that's workable. when i finish up the rest, i load it up with whatever vegetables i have on hand. so if i got chinese tonight and had 3/4 of it left tomorrow, i would cook up several leaves of cabbage and a cup of zucchini and squash and add that to 1/4 of my chinese to help bulk it out and reduce the impact that it's going to have on my day while still keeping me full.
unless you have a chinese place that uses unusually small containers [an 8oz or a 16oz for example] and that you can tell they go really light on the oil i would say that every week is a little too often to have chinese. not that you can't have it at all [by all means, make your own fried rice at home and load it up with veggies], but eating it out can really add up if you're doing it that frequently.
-google first. ask questions later.