Unfortunately, some Chinese restaurants label vegetable dishes covered in meat-based sauce as "vegetarian." They simply do not see broth as being meat.
Sometimes, language can be a barrier, too. I once asked a young waitress in a Chinese restaurant what the sauce contained. She pointed to a glass of water and then to the salt shaker. "This, and this."
But, I have been to a better Chinese restaurant in which they carefully explained the ingredients of the sauces they used, and noted which dishes were vegetarian. This seems to be the exception rather than the rule, though.
slops, gloops, and gruels.