No mustard available so I bring my own.

I have been in Beijing from 1998 when only the Den had decent western food. Usually I cook my own burgers by chopping with two cleavers some stew beef into hamburger. Recently went to Burger King at Oriental plaza. I was surprised when they did not have mustard and would not have any in the future. I was so shocked I even asked if my Chinese pronunciation of mustard was wrong. Sigh I will just bring my own horseradish brown mustard, garlic salt and mesquite BBQ sauce next time. It maybe that locals don’t like mustard but at least they could have some mustard packets for westerners. Also 12rmb $2 for a large fries that seem quite small?