This sentence says that the day Leslie Cheung died was April Fool's Day. After his death, April 1st was no longer April Fool's Day, which was supposed to be a happy day, but the anniversary of Leslie Cheung's death, which was the day when I missed him.

On April 1st, 23, Leslie Cheung fell out of control from the 24th floor of a hotel in Hong Kong, and died before he was admitted to the hospital. He was only 46 years old that year. However, the topic of Leslie Cheung and fans' memorial to Leslie Cheung are still hot every year.

Every year on April 1st, Leslie Cheung's fans come to the hotel where he fell to give him flowers. Flowers are everywhere on the wall, so there is a saying that since you left, April 1st is no longer April Fool's Day.