My wife and I are currently travelling the world (on our UK passports)

And were planning to fly from Kuala Lumpur to Beijing and take advantage of the 72 hour visa free transit, before flying on to Japan. I see that 144 hours is now available. As far as I understand we would qualify for this, can you please confirm that this is the case before we book our flights? From reading this, my understanding is that we do not need to take any action until checking in to board the flight, is this correct? Also when reading up on the 72 hour Visa free transit I recall reading something about having to report to a Police station within 24 hours of arrival, but have not read anything regarding this on the 144 hour visa free transit, can you please advise if anything like this is required?

Many thanks
Andy