HONG KONG, May 15 -- Hong Kong stocks rose 148.09 points, or 0.66 percent, to close on Thursday at 22,730.86 points, as trading of China's Internet giant Tencent Holdings Limited was heated up by a share subdivision plan.

According to the plan effective on Thursday, each of Tencent's existing issued and unissued ordinary shares of 0.0001 HK dollars will be sub-divided into five shares of 0.00002 dollars. The company's shares surged 5.84 percent to close at 108.8 HK dollars on Thursday. The benchmark Hang Seng Index traded between 22,792.63 and 22, 610.01. Turnover totaled 54.88 billion HK dollars (7.08 billion U. S. dollars).

Affected by fluctuations on the mainland's bourses, the Hang Seng China Enterprises Index ended down 20.37 points, or 0.2 percent, to close at 9,971.24 points.

All of the four sub-indices gained ground. The Properties and Commerce & Industry sub-indices grew 0.29 percent and 1.11 percent respectively. The Utilities and Finance rose 0.35 percent and 0.36 percent respectively.

Most of the blue chips gained. Belle International Holdings Limited rose 3.18 percent to 8.44 HK dollars. Lenovo Group Limited climbed 2.3 percent to 8.89 HK dollars.

The senseless anti-China attacks in Vietnam dampened investors' confidence. Texhong Textile Group Limited dropped 7.5 percent to 5. 05 HK dollars. Fittec International Group Limited tumbled 10.5 percent to 0.34 HK dollars.

The attacks came amid rising tensions between the two countries over their territorial disputes after Vietnamese ships and personnel repeatedly harassed the normal operations by a Chinese oil company in undisputed waters in the South China Sea.

Vietnamese Prime Minister Nguyen Tan Dung on Thursday ordered the Ministry of Public Security to ensure security and absolute safety for lives and assets as well as normal operation of all companies, especially foreign invested firms.