Relations between China and the Philippines took a step forward this week during the first Chinese state visit to the island country in 13 years. On Nov. 20, Chinese President Xi Jinping and Philippine President Rodrigo Duterte signed a raft of 29 deals. Though the official announcement left details vague, the pair agreed to cooperate on oil and natural gas development – something Philippine Energy Secretary Alfonso Cusi said would help the countries access resources in the South China Sea....