BCA is probably the worst airline to join in China at this time. After numerous incidents particularly the triple bounce in Macau, the CAAC have come down hard on BCA and foreign pilots are suffering under a barrage of oral, written and simulator checks. Many foreign pilots have been failed and downgraded to satisfy CAAC check fail quotas. If you fail any check and are downgraded, you could spend up to a year in the right seat on reduced pay. Foreign pilots have been experiencing delays in payments no doubt due to HNA Group financial difficulties. Morale is at an all time low in BCA, stress is at an all time high. Many veteran BCA foreign pilots have left in recent past.
Forget about upgrade to A330 as there have been no courses offered for 2 years. BCA is experiencing route cuts, therefore new pilot recruitment is only to replace those leaving. The future of BCA could even be in doubt if there are any more serious incidents.
There are better options in China than BCA..