Just to double check: would 72 hours free transit work?

- I'm flying from Kaohsiung (Taiwan) to Hangzhou.
- Three days later I'm flying from Hangzhou further to Amsterdam.
(Two different tickets)

It seems this schedule qualifies for the 72-hour scheme, however the latter ticket is a one-way one. I had to construct the journey this way in order to have a layover in Hangzhou. Although I read in the description that it's not allowed to use 'single journey' tickets, I'm not sure if that description is what is meant here.

Also, I intend to stay in Wenzhou for two days (also in Zhejiang province). According to the description, you're allowed to travel in Zhejiang province when you use the Hangzhou 72-hour transit.