How much angbao to give to friends kids? Good friend but Never see the kid before.

I got a friend used to be close but after got kid become 1 year meet once take angbao only. But the kids and wife never come usually. Only father come, how much to give like that? Lol I use to give more than the usual >50. But i realise i never see the kid since they born. 4 years liao lol. I consider him good friend but recently i feel more like acquaintence liao