The group also required all subsidiaries to strengthen management on purchases, production and sales to ensure product quality, it said.

双汇集团亦要求所有子公司加强采购、生产管理，保证产品品质。

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With the assistance of the quality manager, implement a quality management system and tools to meet the group and its customers' requirement.

在质量经理的协助下，实施质量管理制度和执行质量管理工具，满足集团及客户的要求。

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Chen Baoshan, chief of the operations management department of Beijing Environment Sanitation Engineering Group Co. Ltd, attributed the decline to the growing public awareness of air quality.

据北京环卫工程集团有限公司运营管理部主任陈宝山表示称，这一现象的原因是因为公众对空气质量的认识日益加强。

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