Wison's headquarters in Shanghai. Chairman Hua Bangsong said on Monday he was co-operating in an official investigation. Photo: Reuters

Doubts about Wison still not eased

Company's statement fails to end rumours of links to scandal-hit oil giant PetroChina

Topic |   PetroChina

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Wison's headquarters in Shanghai. Chairman Hua Bangsong said on Monday he was co-operating in an official investigation. Photo: Reuters
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