The award of $5 billion plus mandate to lead what is expected to be the largest ever IPO from the Mainland is reaching its climax, with a final decision expected to be made before Christmas. The three banks that have pushed hardest to float China's dominant fixed line operator - Goldman Sachs, Merrill Lynch and Morgan Stanley Dean Witter - are all preparing to place their big guns in Hong Kong next week to make a final pitch to the Chinese delegation, who will be in the Territory for the ITU's (International Telecommunications Union) annual conference.