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The Shenzhen-based company said after the market closed on Monday it expected first-half net profit of between 1 billion yuan ($161.1 million) and 1.15 billion, having previously forecast net profit for the period of between 800 million and 1 billion.
That was due to improving margins in its global business, as well as revenue from new contracts to build China's next-generation telecoms network.
Its shares were set to open up 3.2 percent at HK$15.52, outperforming the Hang Seng Index's 0.6 percent rise.