Yik1 waak6 -or

[menoi]

Is this the right tone for the word or "yik1 waak6" ?

Is it better to use "Yik1 waak6" or ding6 hai6 in this sentence

mo4 lun4 lei5 hui3 heong1 gong2 Yik1 waak6/ding6 hai6 Mei5 gwok3, nogh5 do1 tung4 lei5 hui3

???

[Terence]

In Hong Kong, people use both phrase in oral conversation but ding6 hai6 or simply ding6 are more common while jik1 waak6 is used in written only.

[Terence]

correction: jik1 waak6 can be used in formal and written expression whilst ding6 hai6 in oral only.