Group 1 - Airbus secured orders worth $21 billion at the Paris Air Show, while Boeing did not disclose its sales figures [2] - Boeing dominates the global cargo aircraft market, particularly in China, despite facing challenges in the commercial passenger aircraft sector due to safety incidents [2] - China's focus on developing large passenger aircraft has led to a lack of attention on cargo aircraft, resulting in limited models and lower payload capacities for domestic cargo planes [2] Group 2 - Boeing's cargo aircraft shortage is emphasized, with estimates indicating a gap of approximately 60 aircraft needed to meet the projected fleet capacity demand by 2027 [4] - The largest cargo aircraft in China, the Y-20, has a maximum takeoff weight of 220 tons and a payload capacity of 66 tons, while Boeing's 747-8F has a maximum payload capacity of 133 tons [4] - The performance of Chinese cargo aircraft is hindered by insufficient engine power, necessitating significant improvements in aviation engine technology to compete with Boeing [4]