Robot historian Jin Kai was pleased to hear the sound of music in his flat in one of Tianjin's highest towers. The main computer of the flat was programmed to select a random song from the library of over a thousand musical pieces and wake him up with music. He loved the compositions of Tchaikovsky that had a strong emotional effect. As soon as he entered the hall, the lights of the giant aquarium filled with brightly coloured ocean fishes were lit with the music playing. The air was not yet lit up outside. The movements of the fishes were slow and lifeless, like ripples of the algae. From the pipes above the aquarium, he carefully threw bait in different colors into the fish. He liked to feed his fish with his own hands. The fish moved towards the food that exploded like corn when it touched the water. He sat on the stool next to the aquarium and watched the feast of the fish, accompanied by Tchaikovsky music for a while.