MANILA—The Philippines said on Tuesday it had summoned the Chinese ambassador to convey the Southeast Asian country’s “utmost displeasure” over the continued presence of Chinese vessels in disputed waters around a reef in the South China Sea. In a statement, the Department of Foreign Affairs said Chinese Ambassador Huang Xilian was summoned on Monday and told that China should immediately withdraw all its vessels from the disputed Whitsun reef and other Philippine maritime zones. The Philippines last month described the presence of about 220 boats believed to be manned by militias inside its 200 mile (322 km) exclusive economic zone as “swarming and threatening”, while the United States, Japan and others have voiced concern about the Chinese regime’s intentions. The foreign ministry said on Tuesday it had reminded Huang that the Philippines had won a landmark arbitration case in 2016, which backed its sovereign entitlements amid rival claims by the …