From Chen Zi-Ming's book.

陳秉壬秉旺秉奇合傳 [5–7] CHEN BINGREN, CHEN BINGWANG, CHEN BINGQI

三人均好太極拳互相琢磨皆藝精入神人稱三雄

These three men were all experts in Taiji Boxing. They worked to improve each other so that their skills were magical. People called them the “three heroes”. https://brennantranslation.wordpress.com/2017/08/31/taiji-boxing-according-to-chen-ziming/