ACMS,
HLJ (msn 12) was the first A330 built, msn's 1 - 11 were all A340's. HLK (msn 17) was the second A330 built. Both were GE powered originally and were the A330 flight test vehicles.
HLJ was re-engined with RR by Airbus for the Trent 700 test program and then refurbished when bought by CX. HLK was first re-engined to PW by Airbus for internal use then converted to RR when bought by CX.
Cheers