izu:
Is the bond pro-rata at AirMacau ?
No it is not. US50k 5 years for non type rated, US30k 3 years type rated. Either you put the money as a bank gaurantee and the OR they will reduce your salary by 6000MOP/month (US10K/yr) for the bond period. After the bond period is finished they will wait one more year to give it back to you (after 6 years non type rated, 4 years type rated). This one year delay in getting it back is only applicable to the salary deduction bond - not to the bank gaurantee.
It is worth noting that you are bonded again for captain upgrade but this time they only accept a 30k/3years bank gaurantee. On upgrade any bond you had as FO falls away and if you had the salary deduction they will pay you out your contribution so far (pro rata at usd10k/year).
Finally note that the bond periods start on the day you are released to line. Training can be a long process (5-8 months) so factor that in as well.