Hi mgb, thanks for your useful advice.
I am still confusing on below issues even i done a lot of research.....
1) how and when I should provide self sufficient to relevant department for proof? shall i keep both the bank record and health insurance receipts until i apply for nationationlised?
2) I already bought a worldwide health insurance on hands issued by AIA, it mainly for inpatient and day patient. can i use this as a private health insurance? or I have to buy one from other issurer?
3) If i meed to buy a new private health issurance to fulfit the german requirement, can you advise some reference? i tried to search for the cheapest rate as a self sufficient, some forum said the cost can be lower down to about €40/month but i never found it. do you have any recommendation?
Million thanks