Hello, Mrs. Anderson! I think I've found the source for your red ballet flats.
Disney Princesses Blossom Beauty Mulan by Mattel has a pair like the ones you described in a recent post. They're part of her original outfit. Red soft plastic with a thin ribbon molded on the front of the shoes. They are embossed "CHINA" on the soles. Do you think these are the ones - er, is the one - that you have?
Mulan waves hi.
Here are the red flats.