Honestly I haven’t seen many successful cases. Almost all of my “decent” male friends in late 20s - mid 30s have all settled / married ladies that are ~25-27 years in age. I do not have a single example of any of them marrying someone “new” from 30+. Of course, I’m limiting the population to my “decent” guy friends only.
There is just no point for a successful, attractive, capable and decent men in their 30s to meet and settle for a lady 30+. The market, especially in HK, is super efficient, and there is a deep assumption that if a lady is a good catch herself, there should be a minimal chance that she is still single and available into her 30s. All the excuses about not “meeting the right person” or “all the right men are taken” are (pardon me) bullshit. HK is one of the densest cities in the world and you can easily meet 30-50 people friends per year if you just gave a bit of effort. There is simply no convincing excuse.
Most of the 30+ single friends in my circle (attractive, nice figure, income >100k+ HKD/month, owns own property etc) have either
1) married a foreigner (some much older and not very attractive, honestly speaking)
2) adopted pets / surrogate children to raise on their own (don’t need men)
3) 100% focused on work
4) one-night stands at random places / countries with physically attractive men
5) Have started to date much younger men to expand their target population
Happy to talk more in private if you wish - not here to judge at all, just giving you my honest experience and observations.