Summary China is testing an updated variant of the Y-20U tanker with new high-bypass engines to enhance air-to-air refueling capabilities. The Y-20B, equipped with the China-produced WS-20 engine, has a maximum cargo capacity of 66 tons and lower operational costs. The Y-20 is a strategic transport aircraft that enhances China's logistical support capabilities, allowing for urgent domestic transport and intercontinental missions. China has been observed testing an updated variant of the Y-20U tanker, featuring new high-bypass engines, as part of its efforts to enhance air-to-air refueling capabilities. Pictures shared on the Chinese social media platform Weibo reveal the Y-20U featuring...