Before 1997：
1）Well paid groups were Y and then B.
2）
| Top Class | Y > B >= N | |
| MiddleClass | Y >= N > B > R | |
| Bottom Class | N > Y > R > B |
After 1997：
1) Most econonmically stable and HR prefered, OR well-paid people had been staying in the groups of R and N. B started to be jumpy or under-paid group（
The youngers in this group are mostly not preferred by general HK / PRC girls because seeking for money or parasiting usually is the highest priority of such girls.
Make Them Jumpy + Under-Paid OR Suppress the Jumpy + Stablize the groups of R and N, are a set of strategies of the pro-PRC force.
）. N group had been shrinking.
2.a）2014
| Top Class | R >= N > Y | |
| MiddleClass | N >= R > Y | |
| Bottom Class | R > N >= Y > B |
2.b）2019
| Top Class | R > N > Y | |
| MiddleClass | R > N >= Y > B | |
| Bottom Class | Y > N >= R > B |
R has expanded and grown up by https://fringeangel.blogspot.com/2019/12/the-strongest-skills-of-ccp.html but will be shrinked by the US-China Trade War.
