Ur a singaporean and he is a Chinaman
If you need to seek advice to deal wif someone in your own backyard
then no offence its pretty sad. Imagine dealing wif such people
next time on their own turf. I suppose u wanna give ur Godsis some
respect so talk to him and make him understand,
if he wanna continue this then get in touch wif someone u know
thats wif the police theres must be someone u know, frens fren or
relative or whatever and warn him. U be surpise how much can be
accomplish by just flashing a warrant card in their face.