On this occasion it looks like the A320 crew had two good options and chose one of them. CAAC calculated that they could have stopped in time, which was one option - and it is self evident that the option they took was also a good option.
Assuming 110 knots, that is 56 metres per second - that doesn't buy you much thinking time before your stopping margin just went negative - less than 4 seconds could have taken you from 2 good options to no good options.
Hats off to the quick actions of the crew