Since 2012 Q1, methodology has changed so as to monitor both current condition and future expectation. Business Climate is now an weighted average with 40% Current Business Climate and 60% Future Business Climate. Enterprises Survey Organization of National Bureau of Statistics set up this survey system since 1998. Business climate index is the quantitative description of the business climate survey, which can directly reflect the real situation of the economy. The business climate index is ranging from 0 to 200%. 100 is the critical value, when the climate index is larger than 100, it indicates that the economic performance is picking up or improving. When it is lower than 100, it shows that the economic performance is delining or worsening. The selected national level samples are 16,000, including all large-sized enterprises and some medium and small-sized enterprises The calculation method of climate index is using the proportion of enterprises choosing up-ward turning to minus the proportion of enterprises choosing downward turning.