BRIEF-Zhengzhou Yutong Bus' bus sales down 39.3 pct y/y in April

May 4 (Reuters) - Zhengzhou Yutong Bus Co Ltd

* Says it sold 3,189 buses in April, down 39.3 percent y/y

Source text in Chinese: http://bit.ly/2p0l9Q9

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(Reporting by Hong Kong newsroom)