You can try around with a few different things and settle on the one that seems to be getting the best results.
For one week try one thing, and the next week try another and use the one that got the most text backs in a week.
Some guys they claimed they walked around Cebu and handed their number (just their number, no cute message) to girls and that EVERY girl texted them, and they hooked up with many of them shortly after. When I tried handing just my number with nothing else on the paper to girls I got texts 5% of the time. Those guys were just on a short vacation, I highly doubt they got lots of girls to insta-bang like that, in my experience that’s not how it works.
Meeting girls in Asia is super easy and you can take many different approaches to doing so.
I prefer to go the other route and just flood whatever city I am in with numbers.