This example is a primitive and low class one.
The more high tech ones do it online, on dating sites.
With women of other nationalities, including Sinkie women, the main objective for online dating is to expand your social circle. If the right man comes along and something deeper can develop, that's great.
For Tiong women, they immediately seek marriage. No need to 'pak tor' no need for long term dating, all they want is a marriage partner. Perhaps they take the Chinese term 征婚 ('seeking marriage') very literally. Or perhaps they're just gold diggers and want the perks from marrying a Sinkie man. The truth probably lies somewhere in between.
All tiong bu are sama sama, lah. Whether they go online or posting door to door, they are after only money. No money, no come. They want sinkie men for the right to stay on in sinkie land to earn money. Why not go for mudland Chinese men?
If married to sinkie male, they got at least chance to get year to year work permit, if not SPR.