Why Did China Summon the Japanese Ambassador?

The heads of state from China and Thailand have expressed readiness to lead relations into a new era, as President Xi Jinping welcomed Thai King Maha Vajiralongkorn on his first state visit to China (01:16). The Shenzhou-20 astronauts have safely arrived home aboard the Shenzhou-21 spacecraft following a delay caused by a cracked spacecraft window (11:51). And China has slammed Japanese Prime Minister Sanae Takaichi's remarks about the Taiwan region, warning Tokyo of heavy prices for any intervention (13:18).