China's blue-chip index closed at its highest in over a year on Monday, boosted by news of index provider MSCI saying it could substantially raise the future weighting of China 'A' shares in its emerging markets benchmark, Reuters reported. The Shanghai SE 50 Index, an index tracking the 50 most representative blue-chips on the Shanghai Stock Exchange, advanced 0.6 percent to an 18-month high. The index has gained 11.2 percent in 2017, versus a gain of 2.6 percent in the benchmark SSEC. The blue-chip CSI300 index rose 1.3 percent, to 3,668.09 points, while the Shanghai Composite Index ticked up 0.9 percent to 3,185.44 points.