Spice is added to your liking, 1-5, 5 being the hottest. This is true for just about all dishes, including meat and vegetable dishes.
Salads will be about it. You can ask for no spice on meat or vegi dishes, but it will be tough.
The orange chicken, noodles, appetizers, and sushi are all mild if you order a spice level 1. You can even ask for a spice level zero, but it might be a bit bland.
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