What is the relationship between Yang Tiexin and Yang Guo?

Yang Tiexin and Yang Guo are grandfathers. Yang Guo is the grandson of Yang Tiexin. Yang Tiexin is a character in Jin Yong's novel The Legend of the Condor Heroes. Great-grandson of Yang Zaixing, a famous anti-gold star. His sworn brother Guo Xiaotian lives in seclusion in Niujia Village. Later, it was framed by Yan Honglie of Daikin Sixth Newspaper. His family was ruined and exiled to the Jianghu. He changed his name to Mu Yi and accepted Mu Nianci as his adopted daughter.

Yang Guo, a pseudonym, is the hero of Jin Yong's martial arts novel Legend of the Condor Heroes, the son of Yang Kang and Mu Nianci in his previous novel Legend of the Condor Heroes, and the adopted son of Ouyang Feng, a western poison. The names were given by Guo Jing and Huang Rong.