If you buy a ticket of China United Airlines, the cabin is more than 4.5 fold of that of China Eastern Airlines, and you can accumulate membership points of China Eastern Airlines. However, special fares (including A, D, I, U, X, Q, K and W cabins) and chartered flight flight tickets (including all cabins) cannot accumulate points.
I need to know more about the membership system and policies of China United Airlines and China Eastern Airlines. Generally speaking, after accumulating enough membership points, you can upgrade your membership level or redeem your membership rights, including but not limited to priority boarding, free upgrade and gift redemption. For specific membership policies and rights, please refer to official website or consult customer service staff.
Please note that the above information is for reference only, and the specific provisions may vary due to time, place, flight and other factors. If you need to answer further questions, it is recommended to contact the relevant airlines or official channels of member service directly for consultation.