There are 24 hours in a day that is 1440 minutes 86400 seconds, there are 365 days in a year there are 8760 hours 525600 minutes 31536000 seconds, China's land area of 9,600,000 square kilometers (96,000,000); Boys a lifetime a **** there are 300,000,000,000 x 3 times x 52 weeks x 60 years = 280,800,000,000,000,000,000,000,000 spermatozoa, China's longest river is the Yangtze River, the length is 6, 397 (six thousand three hundred and ninety-seven) kilometers, China's largest lake is Qinghai Lake, 360 (360) kilometers in circumference, with an area of 4,500 (four thousand five hundred) square kilometers, China's fastest train is the Shanghai Maglev train, with a speed of 430 (four hundred and thirty) kilometers per hour, the world's largest ocean is the Pacific Ocean, with a surface area of 179,968,000 (one hundred seventy-nine million nine hundred and ninety-six) square kilometers. million eight hundred thousand) square kilometers, the world's largest continent is Asia, an area of 4,400 (forty-four) million square kilometers, the world's largest country is Russia, an area of 17,075,870 (seventeen million seven hundred and seventy-five thousand eight hundred and seventy) square kilometers, the world's tallest mountain is Mt. Everest, which stands at a height of 8,848.8 (eight hundred and eighty-eight thousand four hundred and eighty-eight point eight) meters < /p>