Wake-Up Call

The day my grandfather died, the gong in his house rang by itself, and it rang for three days. I am the last watcher in the Chen family. Look at the shadow at the first watch, ask for mourning at the second watch, and never look back at the third watch - the rules are the fate of our ancestors and the last gate of this city. If the gong doesn't sound, it doesn't move; when the gong sounds, you have to patrol. But before his death, my grandfather signed an agreement: the first watch will be open to welcome guests, and the guests will stop at the end of the day. Guest, has entered the city.