With all covid restrictions now lifted CX 'will need all the 'birds' it can get back in the air ASAP.
Conflicting reports re their return to Cathay and so we will see.
It is taking a long time (about 6 weeks) to get each 77W back in the air and of course all work is off-shore so far from an overnight fix.
Having the 4 back from QR would be faster.....