A Chinese research ship and its escort, which operated for nearly a month in Vietnam's exclusive economic zone (EEZ) in the South China Sea and prompted a rare protest from Hanoi, left those waters late on Monday. Chinese vessel Xiang Yang Hong 10 began sailing in Vietnam's EEZ on May 7, at times flanked by a dozen ships, regularly crossing gas and oil fields operated by Russian companies, according to vessel-tracking data.

Chinese ships leave Vietnam waters. (2023, June 7). Philippine Daily Inquirer, p. B4.