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Possible Reasons Why China Yunnan Airlines Did Not Purchase the Boeing 777 - Route Demand Matching: In its development history, China Yunnan Airlines may have determined that the Boeing 777, a large wide-body aircraft, did not fully align with its operational needs based on the characteristics of its route network and passenger demand. For instance, aircraft like the Boeing 737 and Boeing 767 were already sufficient to meet capacity requirements on its main domestic routes and some nearby international routes, eliminating the need to introduce the Boeing 777 with a larger passenger capacity.- Cost Factors: The Boeing 777 has relatively high procurement and operational costs, including aircraft purchase price, maintenance expenses, and fuel consumption. From a cost-effectiveness perspective, China Yunnan Airlines may have concluded that introducing the Boeing 777 would not yield the desired economic benefits.- Impact of Historical Procurement Decisions: Historically, China Yunnan Airlines once planned to purchase the Boeing 757, but later opted for the Boeing 767 instead to adapt to changing demand and avoid penalties for canceling the order. Such changes in historical procurement decisions may also have influenced its subsequent willingness to purchase the Boeing 777.- Parent Company's Strategic Arrangements: China Yunnan Airlines later became a member of the China Eastern Airlines Group. China Southern Airlines has its own plans and layouts for Boeing 777 procurement, and it may coordinate the aircraft configuration of its subsidiaries from the perspective of overall group strategy. This resulted in China Yunnan Airlines not having an independent plan to purchase the Boeing 777.