Saw an article regarding J-15 pilots posted by CD member 注册个号来提问.
Apparently the 6 J-15 pilots attending the Victory parade is the 4th group of J-15 pilots who will be reporting to the Liaoning afterward for more takeoff and landing training. (other than the lead plane pilot. Two backup pilots +4 other pilots)
Before that they've been training at a navy carrier base for the last 3 years. Once this new group of pilots pass the training at the Liaoning carrier, they will be the 4th group of pilots receiving carrier-based fighter pilot certification.
Prerequisites for basic carrier-based fighter pilot training:
1. Under the age 35.
2. Have flown 5 different types of planes.
3. Flight hours 1000+.
4. Flight hours for 3rd generation fighter jet 500+.
5. Have participated in joint training and joint major exercises and tasks.