China and Japan traded barbs on Friday over recent remarks by Prime Minister Sanae Takaichi on Japan's potential involvement in a Taiwan contingency, as the two Asian neighbors locked themselves in an escalating diplomatic row.China has summoned the Japanese ambassador in Beijing and demanded that Takaichi retract her remarks, the Chinese Foreign Ministry said Friday, while Japan's Foreign Ministry said it lodged a similar protest the same day over a recent social media post by a Chinese diplomat responding to the remarks.Also Friday, China urged its citizens to avoid visiting Japan, with i…READ FULL ARTICLE