Maybe it's because that flight is operated by the B747-400 which can withstand more crosswinds than other aircraft and the captain thought it is safe enough to attempt a landing. Very few flights at HKG are operated by 744 these days, which could explain why no other flight has attempted a landing during T10 today.

I've read about a time at SFO where winds were particularly strong that night, and all other aircraft such as the 340, 777 etc. had to be grounded, but CX873 operated by 744 at the time had no problems departing on time.