As reported by an AP article carried by the Japan Times, a Chinese Communist Party youth newspaper's depiction of mushroom clouds over Hiroshima and Nagasaki, alongside headlines readings “Japan wants a war again,” and “Have we been too friendly to Japan in the past?”, has prompted protests by the Japanese national government.
Meanwhile, the Chinese government has expressed concern over recent changes to the interpretation by Japan's ruling party of its peace constitution, which would apparently allow the Japanese military to come to the aid of allies for the first time since World War II.
As the article concludes:
"In the closing days of World War II, the U.S. dropped an atomic bomb on Hiroshima on Aug. 6, 1945, ultimately killing 140,000 people, and a second one on Nagasaki three days later, killing another 90,000, prompting Japan’s surrender."