美国企图污蔑中国搞核试验，中俄驳斥：完全没有根据

Core Viewpoint - The article discusses the recent accusations made by the U.S. against China regarding nuclear tests, which are seen as attempts to justify the U.S. resuming its own nuclear testing following the expiration of the New START treaty [1][3]. Group 1: U.S. Accusations and Responses - U.S. Assistant Secretary of State Christopher Yeaw claimed that a seismic event near China's Lop Nur nuclear test site in 2020 indicated a nuclear test, suggesting that China might be using "decoupling" methods to hide such tests [1][3]. - The Chinese Embassy in the U.S. responded by stating that the U.S. accusations are baseless and politically motivated, aimed at justifying its own nuclear testing [3][8]. - Russian officials also denied the U.S. claims, asserting that neither Russia nor China conducted any nuclear tests, and emphasized the lack of evidence supporting the U.S. allegations [3][5]. Group 2: Historical Context and Nuclear Arsenal - The article highlights that the last confirmed nuclear tests by the U.S. and China occurred in 1992 and 1996, respectively, while Russia's last confirmed test was in 1990 [6]. - Current estimates indicate that Russia possesses approximately 4,300 nuclear warheads, the U.S. has around 3,700, and China has about 600 [6]. Group 3: Implications of the New START Treaty Expiration - The expiration of the New START treaty has raised concerns about a potential new arms race, with analysts suggesting that the U.S. may double its nuclear arsenal in the absence of such agreements [7][8]. - Experts warn that the U.S. leadership's belief in winning a nuclear arms race could lead to dangerous outcomes, including the proliferation of nuclear weapons among allied nations [7].