Earlier this month, the media reported that US President Joe Biden approved a new nuclear strategy in March, which refocuses on China's growing nuclear arsenal but also addresses concerns of potential coordinated nuclear challenges by China, Russia, and North Korea against the United States.
"In recent years, the United States has invested heavily in miniaturizing nuclear weapons and using them in real combat, and it has double standards on the issue of nuclear proliferation, which seriously threatens strategic stability in the world," Wu told a briefing.
China opposes the US expanding its nuclear arsenal under the pretext of a non-existent "Chinese nuclear threat," the spokesman said.