Max Zhang is several years younger than Ada Choi.

Eight months. According to public information inquiry, Ada Choi was born on 1 September 1973 17, and the distance is1June 19741day, with a cycle of 3 months 13 days. Max Zhang was born on 1 May, 197419th, and five months and zero days from1June, 197419th. 5 plus 3 equals 8, 13 plus 19 equals 3 1. It is concluded that the difference between the two is about 9 months; Because 1 year has 12 months, 9 divided by 12 equals 0.75 years. That is, the difference between the two is 0.75 years old.