In the footage, he is seen giving tourists directions, getting water for a baby and even helping a neighbor sell yogurt.
"China's military has the ability and determination to defeat all attempts to separate our country, and it will adopt all necessary measures to resolutely defend national sovereignty, security and territorial integrity," ministry spokesman Wu Qian said.
Once remote and underdeveloped, Hainan has become one of China's most open and dynamic regions and a top tourist destination.
Since the 18th CPC National Congress in 2012, the CPC Central Committee with Comrade Xi Jinping at the core has worked toward the overall goal of improving and developing the system of socialism with Chinese characteristics, while modernizing China's system and capacity for governance.
The Belt and Road Initiative, which includes the Silk Road Economic Belt and the 21st Century Maritime Silk Road, aims to build trade and infrastructure networks linking Asia to Europe and Africa along the trade routes of the ancient Silk Road.
There were no terrorist attacks in the Xinjiang Uygur autonomous region last year, the region's chairman said on Tuesday as he discussed the regional government's determination to keep the social situation calm.