原标题：国际原子能机构总干事就美英澳核潜艇合作问题发布报告 中方对报告实质内容严重关切国际在线报道（记者 蔡靖骉）：外交部发言人毛宁13日表示，中方注意到国际原子能机构总干事日前就美英澳核潜艇合作相关问题发布的报告，中方认为这在程序上是正确的一步，但是对报告的实质内容存在严重关切。    A documentary on the domestically developed Y-20 large transport aircraft family, aired by state media on Wednesday evening, revealed that the Y-20B can switch between transport and aerial refueling functions. A pilot said the aircraft could also take on roles including bomber, early warning aircraft and electronic warfare platform. 
With such modifications, the Y-20B platform offers significant advantages in mission flexibility and support capabilities, a military affairs expert told the Global Times.
According to the video released by state broadcaster CCTV News, since the Y-20 was equipped with the domestically developed high-bypass-ratio turbofan WS-20 engine - nicknamed "Chinese heart" - the Y-20B's mission profile has become more flexible. While it is primarily a transport aircraft, it can be quickly converted into an aerial refueling tanker by adding refueling pods and related kits. The line between transport and tanker aircraft is increasingly blurred, and this has significantly expanded the Chinese People's Liberation Army (PLA) Air Force's tanker fleet.
Previously, a promotional video released by China Military Bugle, an official media account affiliated with the PLA news media center, showed that in 2025, the Y-20B was fitted with the WS-20, making it more powerful, more fuel-efficient, longer-ranged and part of a growing family of aircraft.
In the CCTV documentary, Pang Rongqi, a member of an Air Force aviation unit, said: "As a transport aircraft platform, the Y-20 is unique to our country and will play an increasingly important role in the future. The boundaries between transport aircraft and bombers, early warning aircraft, or even electronic warfare aircraft are becoming increasingly blurred. It is possible that all these missions could be accomplished with our transport aircraft platform."
Song Zhongping, a Chinese military affairs expert, told the Global Times on Thursday that the key message from this official release is that the Y-20B is a multi-role platform capable of rapid switching between transport and refueling functions. 
The fully domestically developed Y-20B itself is an integrated transport-tanker platform, embodying the concept of a multi-role tanker transport (MRTT). By equipping different functional pods, it can quickly change roles: With refueling pods, it becomes a tanker; with electronic jamming pods, it becomes an electronic warfare platform; with bombing modules, it could potentially perform bombing missions; and with early warning modules, it can serve as an airborne early warning platform, Song said.
It is not uncommon internationally to modify transport aircraft for special roles, including bomber-like missions. In March 2021, the US Air Force converted an MC-130J transport aircraft into a bomber by having it drop a JASSM (Joint Air-to-Surface Standoff Missile) deployment box, according to a Forbes report in May 2021. 
Thanks to the Y-20's fully indigenous design, Song said, Chinese engineers have a comprehensive understanding of its aerodynamic configuration, airframe structure, flight control and avionics systems. This means that, as long as the technical conditions are met, modifications can be carried out with greater flexibility and tailored to operational needs. Whether it is a "quick-change" multi-role configuration through pod-based modularization, or deeper modifications, such as installing large radar domes for dedicated early warning aircraft or adding more fuel tanks for dedicated tankers, all can be flexibly achieved.
Song also said that the Y-20B can quickly switch between transport, tanker and electronic warfare roles by mounting different pods, achieving multi-role capability and greatly enhancing the PLA Air Force's mission flexibility and support efficiency.
Its platform potential is vast. It can be deeply modified into dedicated special mission aircraft such as early warning or electronic warfare platforms, filling critical capability gaps in the Air Force. At the same time, it can maintain its basic transport function and, when needed, rapidly transform into other combat platforms through modularization, becoming a true all-rounder.
The core value of this flexibility is that it allows rapid reconfiguration based on wartime mission requirements, while in peacetime it can perform routine transport missions, maximizing equipment effectiveness. The Y-20B's service not only represents a leap in China's strategic projection capability but also provides critical support for the PLA Air Force in building a systematic and diversified air capability, Song noted.
On July 6, 2016, the Y-20, China's domestically developed next-generation large military transport aircraft, officially entered service with PLA Air Force aviation units. A decade later, the Y-20 has evolved from a single transport platform into a family of models including the Y-20A, Y-20B and YU-20 aerial refueling tanker, with its operations extending to more than 40 countries and regions across four continents, according to the Aviation Industry Corporation of China, the aircraft's manufacturer, on its WeChat account in June 2026.
。据报道，9日，国际原子能机构总干事格罗西就美英澳核潜艇合作保障监督问题向机构理事会提交报告，表示机构已与三国就相关问题开展技术磋商，总干事欢迎美英澳就此与机构保持接触。在回答有关提问时，毛宁表示：“总干事报告片面引述美英澳为自身行为辩解的言论，绝口不提国际社会对三国核潜艇合作存在核扩散风险的重大关切，无视很多国家关于三国合作违反《不扩散核武器条约》目的和宗旨的严正立场，并越权就本该由机构成员国讨论决定的事项得出误导性结论。”毛宁强调，美英澳核潜艇合作事关《不扩散核武器条约》的完整性、有效性和权威性，相关保障监督问题涉及国际原子能机构所有成员国利益，应由机构所有成员国共同讨论决定。为此，中方已建议机构成立所有成员国均可参加的特别委员会，就所有相关政治、法律和技术问题进行深入讨论，并向机构理事会和大会提交建议报告。

B | 毛宁说：“在各方达成共识之前，美英澳三国不应开展核潜艇相关合作，机构秘书处也不应擅自与三国谈判针对三国核潜艇合作的保障监督安排。”毛宁敦促机构秘书处秉持客观、中立和专业立场，严格根据授权履行职责，为讨论解决成员国对美英澳核潜艇合作的核扩散关切提供平台。

C | 同时，中方呼吁机构所有成员国继续通过政府间进程，就美英澳核潜艇合作问题开展实质性讨论，以实际行动共同捍卫以《不扩散核武器条约》为基石的国际核不扩散体系，共同维护国际和平与安全。

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