staff heard baby girl crying in the ladies ' toilet of a burger bar in chengdu , sichuan province , reports people 's daily online .
workers who found the baby , who was wrapped in a shirt but was still attached to the umbilical cord and placenta , called the police and ambulance .
staff at the restaurant said they saw the woman going into the toilet and noticed that she 'd stayed there for a long time .
after she came out , she went back to her seat , sitting there without speaking a word .