China

China lies mainly in the northern temperate zone under the influence of monsoon. From September and October to March and April next year monsoon blow from Siberia and the Mongolia Plateau into China and decrease in force as it goes southward, causing dry and cold winter in the country and a temperature difference of 40 degree centigrade between the north and south.The year of 1998 saw19.91 million births, 8.07 million deaths of the population, with a net growth population of 11.84 million (compared with 12.37 million in 1997); More than 10% of total population is over 60 years old (1999 data).