Xinhua News Agency, June 15, the index strengthened, the gem index rose more than 2%, the Prev index rose 0.21%, and the Shenzhen Composite Index rose 1.05%. Robots, reducers and photovoltaic were among the top gainers, with nearly 2200 stocks rising in the two cities and nearly 5 per cent in the days of Ningde, the heavyweight stock on the gem.