That it's more than a year since the last posted delay is indicative of how few flights mainland Chinese airlines have operated to Australia in 14 months.
Frequencies are slowly ramping up given that numbers of mainland communist Chinese students are at about half what they were pre-COVID, and its government's instruction that online-only courses are out of favour. AC is still only operating thrice weekly to MEL and four nights a week to SYD, so not even daily, although historically PVG had more frequent Chinese airline flights to both, and QFi for a time tried PVG, but that ultimately failed.
On Monday 12 June 2023 - King's Birthday - CA165, the 0105 hours from the capital PEK to wannabe international city MEL took off at 0218 hours. Arrival for A359 B-1085 should be at about 1512 hours mid afternoon, 37 minutes behind the timetable.