The prawn noodles soup had a 清甜古早味, with mainly sweetness from the pork, and some brininess from the prawn. Comforting old school bowl. Perennial favourite, with a 20 minute queue in the morning.
I'm not sure if there is a corresponding stall at Whampoa Food Centre that does it the same way, but this one here at Tekka Centre is worth coming back for (665 Buffalo Road #01-326).
It is a good stall in the estate to have old school prawn noodle flavours here at 545 Whampoa Prawn Noodle.