Source:
https://scmp.com/article/508182/cnooc-us25b-bid-sweeten-unocal-deal

CNOOC in US$2.5b bid to sweeten Unocal deal

Firm in last-minute offer to compensate shareholders if takeover falls through

CNOOC will set aside US$2.5 billion to compensate Unocal shareholders should it sign a takeover agreement with the California-based oil firm's board but subsequently fail to complete it, according to sources close to the situation.