希望子女谈多些包容，尽可能不要删帖，谢谢。
1. Korean American David Cho to lead President Biden's secret service detail
Jan 20, 2021
https://en.wikipedia.org/wiki/David_Cho_(Secret_Service)
2. Number of martial arts participants in the United States from 2010 to 2023
https://www.statista.com/statistics/191917/participants-in-martial-arts-in-the-us-since-2006/
