Xi was elected president by a unanimous vote on Saturday morning at a session of the National People's Congress, China's top legislature.
He stressed the underlying principle of pursuing progress while ensuring stability, the people-centered development vision, the notion of "great struggle, great project, great cause and great dream," and coordinated implementation of the five-sphere integrated plan and the four-pronged comprehensive strategy.
Last month, US President Donald Trump signed a bill that encourages visits between the United States and Taiwan at all levels, which China strongly opposed.
"China will consider Gambia's national conditions and characteristics and give full play to the complementarity of our two countries," Li said.
Both sides can share experience in national governance and legislation, promote people-to-people and cultural exchanges and improve the legal environment for pragmatic cooperation, said Zhang, chairman of the NPC Standing Committee.
"Cultural relics are not renewable and cannot be replicated. If they are destroyed, the country will lose precious items of historical significance," he said.