Electrician Zhang Yuan discovered a layer of strange pulses while repairing a circuit - an invisible network was spread under the power grid of the entire community.
This network does not repair faults. It swaps electricians for repairing circuits with lawyer consultations, swaps lawyer consultations with piano lessons, and switches piano lessons back to electricians for repairing circuits. No one owes anyone anything.
Zhang Yuan followed the signal and found the old man who built the network. The old man showed him a note from nine years ago——
I can repair all electrical appliances, no need to replace anything. Just open the door and let me come in and sit for ten minutes.
No one came.
The old man waited for nine years for someone to succeed him. Zhang Yuan said, here I come.
Later, more and more people joined the community: a rider who saved points for three years and never redeemed them, a Chinese medicine doctor who felt everyone's pulse but never felt his own, an English teacher who sold his piano, and a masseur who still gave massages when his waist was broken.
