Hao can be "cry", kao can be "cry" too.
The word "filial" is "hao soon" > 孝顺。
During funeral,hao lum is somehow short form of hao lum
kia.>孝顺仔〉孝顺的孩子。
*When not during funeral, ppl say "you see that hao lum kia
/ you dun hao lum lah" somehow mean that person cry till
super jia lat as if his/her parent pass away, bcos that
person hv deep feeling for his/her parent, unable to control
his/her emotions thus cry in a way that is unimaginable pityful or
other see liao also heart sour way.
Something like:>"Kao Peh Si Bu" 哭爸死母 like that.
To really see ppl cry
jia lat>is either "at during the time when a
family member or someone very close is pronounce dead by
whomever> at that point in time when mind goes blank" or "during
when coffine moving on the electric machine going for burning where
the {hao lum child} shout:“faster fly/move away, fire is
coming”
Best part> the soul is so called already got
transferred/kept/inside the hand-writen tablet(clipped inbetween
the 金银子) or the blue colour paper lantern.