Have you noticed that by focusing on vocabulary in the textbook, you not only pass paper 2, and that you can pass the whole paper too!
Paper2 : 50/90 assume comprehension 0/40
Paper 1: 22/40 assume your compo is average
Paper 3 oral : 25/50 as in just pass
paper 3 LC: 10/20 as in just pass too
Total is 107/200 which about 53.5% = AL6 = PASSSSSSSS!
So passing PSLE Chinese is really simple math!