Efforts to cool down the economy may not be working as well as the government expected. A survey by China's National Bureau of Statistics shows the business climate index rose to 135.9 in the second quarter of 2006, up from 131.5 in the first three months, the South China Morning Post reported. Construction businesses showed the largest gain, rising 11 points in Q2 from Q1. The bureau surveyed 19,500 firms. The index works on a scale of 0 to 200 with anything over 100 showing improving business conditions. Survey results are in line with recent economic data. China's gross domestic product jumped 10.3% during Q1.