So, what is regret?

Is it Blake's Grade 3 muscle strain that brought him to tears at the Douglas Diamond League?

Was it Ronaldo in Rome in 2002, who couldn't hold back his tears after being substituted early?

Michael Irving again, he caught the wind, but couldn't outrun the injury, struggling to crawl out of bounds.

In the first round of the 2007 playoffs, at the post-game press conference, McGrady said "It's my fault" 11 times.

Was it in 2011, when Yao Ming was in his prime, that he reluctantly announced his retirement?

Is this Kobe Bryant, who tore his Achilles tendon in 2013, returned to the locker room after his free throws, and couldn't hold back his tears?

Or was it Lin, clutching his knee, repeatedly saying "I'm done for" to the camera six times?

...

In 2000, at the beginning of the century, when Chen Yu walked out of the gates of Jackson Memorial Hospital in Miami, he looked up at the sky, ready to say no to all these regrets.