ERHC Energy Inc (ERHE)

[Krombacher]

Dec 2009 Chinese article:

In West Africa, Sinopec is also looking at acquiring other petroleum companies. Sinopec completed a takeover of Swiss-based Addax Petroleum for $7.5 billion marking Chinas biggest foreign takeover.[11]. Sinopec is also looking into other companies such as ERHC Energy which has multiple oil block assets in the Joint Development Zone[12].

For what it's worth:

http://www.upicture.com.cn/book/htm/30/4267.htm

Now if anyone reads Chinese and can get to footnote 12 somehow, it might give the source of the above quote.

Krombacher