Can i use this TWOV policy more than once in a short period of time?

I am travelling to a few countries in Asia but it does not say if the TWOV policy is restricted to one use within a certain period of time.
My flight path is as follows UK > Beijing > Korea > Malaysia > Shanghai > UK.
I am planning to stay within the 72 hours each time. Does this qualify for the TWOV policy or is there a restriction on how many times you can apply for it within a certain time period?