Prior to the Tang Dynasty, the civil organizations in town were not stable, owning to the introverted management system of Li and Fang.

唐朝以前，由于实行封闭的里坊管理体制，城市中的民间组织难以固定。

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Now the quality management system of Li De Petrochemical Equipment Factory has been perfected step by step by taking improvement measures on seven aspects.

通过采取七个方面的改进措施，华北石油利德石化设备厂的质量管理体系得到了逐步完善。

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"We are working hard to improve the monetisation system for mobile and to educate our customers to take full advantage of mobile, " Mr Li told analysts on a conference call after the earnings announcement.

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