If there was any doubt that Asia is becoming once again a serious hunting ground for advisers, CNOOC’s bid for Unocal must wipe it away.

The deal breaks ground on a number of fronts, not least as the largest unsolicited bid from a Chinese acquirer, and if successful, promises to re-write the book in terms of the fees professional advisers can generate from Asian clients. The high-risk bid, which would take months to crawl its way past US regulators, is expected to generate as much as $300m ($164m) in adviser fees should it go all the way.