My 4 year-old is enrolled in Cambridge Thomson CDC, just opp Aitong Sch.
It's a great school in terms of pricing (mid-range), teachers & curriculum. Of course, there're some cons but the benefits more than outweigh the cons.
The kids come from predominantly English speaking homes so joining in at k1 may be stressful as N2 kids are doing blending of CVC & quite a lot of stuff for Chinese. Expect to do a bit of parent participation as there are lots of activities.
PM me for details. I could email pix of N1 term 4 work samples as we joined in Oct/nov last year. N1 kids do mainly letter sounds for English & basic working vocab for Chinese.