We've often said that Yeung Teet Sum was an idiot for searching around blindly for his wife and son and the wife and son of his sworn brother, Gwok Siu Teen, for eighteen years when he could have just gone to Mt. Chung Nam and asked Yau Chui Gei at the Chung Yeung Temple.
Then again, why would he even think about doing that? By the time that the Yeung/Gwok home in Ox Village was attacked by Deun Teen Dak's Sung troops, Yau Chui Gei had been long gone. Yes, Yau Chui Gei returned later and found out what happened at Ox Village, but Yeung Teet Sum would not have known that. As far as Yeung Teet Sum was concerned, Yau Chui Gei left Ox Village after that night they spent drinking together and never returned...and never would have known anything about what went down in Ox Village.
So perhaps we've been a bit unfair to Yeung Teet Sum?