Sun Ke and Lulu are fellow villagers. In 2007, Lulu went to school in Nanjing Institute of Education, while Sun Ke was training football in Nanjing Institute of Education. Because I'm a fellow villager, I met him like this, but I'm just an ordinary friend and occasionally send text messages.
Later, Lulu returned to Xuzhou after graduating from university and taught mathematics in a local primary school. The distance between them is far away, and it seems that there is no intersection anymore. But by chance, Sun Ke met Lulu again in Xuzhou. At first, Lulu didn't know much about Sun Ke. After a brief greeting, Lulu remembered this friend she met in Nanjing. The next story is that shy and introverted Sun Ke launched an emotional offensive against Lulu. Later, they really got together.
Only after they got together did they know that they had been neighbors since childhood, that the distance between the two families was no more than 500 meters, and that their parents had known each other for a long time and were good friends, which really meant "childhood friends".