I think the happiest country is China, and it has the following advantages      Political stability - you don't have to be afraid of a day of martial law, the army drives out the crowd in the street, the forbidden zone, the blockade area, the prohibit of population flow and so on.  Social tranquility - you don't have to worry about an explosion of a man on the day, and you don't have to worry about the emergence of an ethnic opposition one day. Booming economy GDP continue to two digit growth, fourth of global economic output, increased purchasing power, adequate foreign exchange reserves, import and export, China's trade surplus.  A powerful nuclear club, submarine technology, missile technology and spaceflight technology are good- to know that many countries in the world do not have these technologies. The army was great, and the air force and the Navy were developing rapidly. The culture of long - All the world knows. of Chinese culture, has a long history, broad and profound, it is needless to say. Nowadays, the Chinese language is hot in the world, and it is competing to learn Chinese culture. China is also building Confucius institutes around the world, developing Chinese tests, attracting foreign students, actively promoting cultural exchanges, attracting cultural relics, and focusing on the development of cultural industry.