The 747-400 was officially launched in 1989, retaining the extended second deck design of the 747-300 and adding wingtip winglets. The newly designed cockpit only requires 2 drivers, with an increased fuel tank and better performing engines.The production of the 747-400 continued until 2009, making it the best-selling model to date, with 694 aircraft delivered. The 747-400 continues to build on the successful foundation of dual passenger/cargo transportation capabilities and has developed multiple versions to meet the needs of different airlines.For a long time, the 747 has been the best-selling wide body aircraft among all. This continued until it was replaced by the Boeing 777 after March 2018. This expression looks like:-~-