Justin Sun, the 29-yearr-old founder of the Tron Foundation, said he had come down with a 'very painful' case of kidney stones. But in a Weibo post published on Thursday that sounded like a forced apology, Sun apologized for  "excessively" promoting the lunch, and for setting a "bad example" for the public.

In a lengthy post on Weibo, Sun, who turns 29 this month, said he acted immaturely and set a bad example for the public while "excessively" promoting the event. "It has produced a lot of consequences that I completely did not expect," he said, without elaborating on what they were.

Hours earlier, Sun sent out public invitations to other crypto evangelists over social media. Perhaps Sun struck a nerve in a country which, only 30 years ago, might have condemned Buffett as a Western capitalist devil. But in modern China, where "to be rich is glorious" this seems unlikely, according to Bloomberg.