Do respect your elders
You should respect any formal hierarchy or seniority that becomes evident to you in Malaysia. Family is central to Malaysian life. As such, elders and particularly senior family members should be treated with honour and esteem. It is not uncommon to see younger people bowing their heads as a sign of respect when passing an older person. Challenging a figure of authority in public would be regarded as completely improper and would most likely render you utterly disrespectful and dishonourable in the eyes of your Malaysian counterparts.