Jiangcheng in June is like a hamburger that has been thrown into a microwave. The asphalt pavement is sizzling with oil, and even the wind blows with a sticky heat wave, which sticks to people's faces and makes them breathless. Song Xiang was riding his electric bicycle that rang everywhere except for the bell. In the basket were two milk teas marked "more ice and more sugar" and a burger with double cheese. This was the 17th time he had delivered food to "201, Building 3, Xingfu Community" this month. The customer was a little girl who had just finished the college entrance examination. Every time he placed an order, he had to write a line of small words in the remarks: "Please hurry up, my mother won't let me eat these."