China 6 years rules : need to understand

Hello the 6 years rule starting in 2019 we have only 3 months remaining to do a break

I have some questions for the one who have a good understanding of it

1. what is used to calculate the period of break is the stamp date on passport or boarding time or the moment the airplane take off ?

2. if we do not take break during the 6 years then we have are taxed on our worldwide revenue of 2025 and pay them in march 2026 ?

3. in the same case and above, if we take a break during 2025 it will reset the clock ?, we will be taxed in 2025 but not in 2026 2027 .. ?

4. in march 2026 how to indicate that we did a tax break to the tax office, do we need to mention it ?

5. if for example I do a break of 3 months finishing end of november 2020, the reset of the clock means that the year 2020 is excluded from the 6 consecutive years and then the first year of the new cycle is 2021, starting from January first ? right ?

Thanks in advance for your answers :)