I don't recall ever having seen a firm date. People have been saying it was a malfunction of some kind that caused it to have to wait to get painted, but it has been re-scheduled for June? Perhaps it will deliver then.
Maybe there will be some combined ceremony to go with the delivery of LN 1500 to LH, which is tentatively scheduled for June as well?
With the impending painting of the first frame for Air China, it probably makes sense to have a thread like this as well.
Today, Boeing released a whole bunch of rendered images of the Air China 747-8I, calling it the "new flagship of China" and noting that "Air China will use the 747-8I to expand its international routes".