The topic of the tripartite summit with the participation of Chinese President Xi Jinping, Russian President Vladimir Putin and American leader Donald Trump has not yet been determined, and it could be the limitation of nuclear weapons or Ukraine. The Wall Street Journal writes about it. The publication states that there are still differences of opinion on what the leaders can discuss. Therefore, Vladimir Putin wants to focus on Ukraine, and Trump intends to discuss issues of nuclear weapons control. However, China has "long resisted" participating in nuclear weapons negotiations, as it lags behind Russia and the United States in this component. "From Beijing's perspective, joining arms control negotiations now would effectively perpetuate nuclear inequality. "No Chinese leader - and certainly not Xi Jinping, who oversaw the most significant expansion of the nuclear arsenal in Chinese history - would agree to this," the media noted.