A probe into the origin of "the city without tears"

Legend has it that a long time ago, there was a beautiful place called the city without tears. There lived a happy prince and a beautiful princess in the city. They love each other deeply. However, this beautiful love is so tragic that they can only live and die together. This sad love infected everyone in this city, and the world held their pity and shed tears for them. Slowly, everyone's tears dried up. ...

Now, this place is still called the city without tears, where there is only laughter and no tears. This is a castle that produces happiness! Deng Chao, a masculine and gentle man, is the prince of our happy castle. He passed on his happiness to everyone in the castle and made them happy forever.