Sweet potato vendor

Here’s a picture of a place I buy lunch once in a while. This lady has an old metal drum with one end cut off of it. She puts some coals inside and cooks sweet potatoes and corn on the cob on top. The corn on the cob in China is popular, but I’m not sure why. Its very bland tasting and sort of unpleasantly chewy. The sweet potatoes are good though. At first she charged me 4 RMB or about 50 cents U.S., but after a while she started charging me 2 RMB. I felt good that I had qualified for local pricing. My Chinese coworkers think its hilarious that I buy from the metal drum lady.