I thought that in part 1, the assassin girl selling beef noodles said that she saw ye Qing mei's assassination after ye Qing mei gave her some food or something. So that is now different since it said that she was stabbed after giving birth.
You are mistaken with "sword snow stride". It was a scene in drama "sword snow stride" that an assassin girl disguising as meat soup seller had been given money by the queen to bury her parents. Both "joy of life" and "sword snow stride" were played by Zhang ruo yun.
