For over 50 years, Kok Sen has been feeding hungry diners with cze char classics, such as their stir-fries boasting exceptional wok hei. Look out for the colourful lightboxes with signature items like prawn paste chicken or fish cooked in various ways. Seating may be a bit cramped, but the round tables and green booth seats work well with a grey colour scheme and pale wood. Given the small number of tables, expect to queue.