Contact of project of invite public bidding of limited company of ad of Beijing capital airport besmears Yu Ying expresses.

北京首都机场广告有限公司招标项目联系人涂玉瑛表示。

Invite public bidding and bid be pregnant with exchanges an activity at inchoate and simple goods production and commodity.

招标与投标孕育于早期简单的商品生产和商品交换活动。