Baozi shows his neighbours’ keys that he kept as a memento of his lost neighbourhood. “The keys are useless now, because the doors and locks are gone, but it’s a symbol of trust.” 

黄志手里托着邻居家的钥匙，那是以前邻居托他帮忙保管的。现在房子没了，但是钥匙他还留着，等到更合适的时候还给邻居，这是一种信任。