The two regions are home to around 27 million people in the most populous state in the United States with a population of around 40 million.
The two agreements "will create jobs, boost growth and bring our continents and peoples closer together. Today's agreements show the potential of our partnership (with China) and we should continue on this path of cooperation," he said.
The two countries enjoyed close exchanges at the top level and strong political mutual trust in recent years.
The two leaders have reached many important consensuses via these meetings, which have sent the world a positive signal on China-India friendship and reflected the strong will of the two emerging economies to enhance mutually beneficial cooperation and achieve common development, according to Xi.
The two diplomats held phone talks on Sept 2, agreeing to meet as early as possible. Choi is the former presidential secretary for peace planning.
The two leaders also exchanged views on the situation on the Korean Peninsula.
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The two sides commit to uphold the UN Charter and international law, and all three pillars of the UN system, namely peace and security, development and human rights.
The two countries are also working on a 253-kilometers high-speed railway linking Bangkok with the northeastern province of Nakhon Ratchasima, the first standard gauge high-speed railway in the country.
The trip also helps Beijing get to know what areas Tokyo wants to cooperate on more in the near future, he said.
The two parties signed a letter of intent to work together in 2013, drew a road map for aviation security in 2015, and in 2016 launched the EU-China Aviation Partnership Project, according to Feng. A letter of intent supporting the project was signed on Wednesday at the conference's opening ceremony.