 The Haikwan tael was preferred over the Kuping tael (庫平兩) by many merchants across China, this was because the units of the Kuping tael varied often to the advantage of imperial tax collectors, this form of corruption was an extra source of income for government bureaucrats at the expense of traders.The Haikwan tael unit was completely uniform, it was very carefully defined, and its creation had been negotiated among the various colonial powers and the government of the Qing dynasty.The Haikwan tael was on average 5% to 10% larger than the various local tael units that had existed in China, this was done as it deliberately excluded any form of extra surcharges which were embedded in the other units of the silver tael that existed as a form of intermediary income for local government tax collection, these surcharges were added to local taels as form of corruption and these taxes never reached the imperial government under the traditional fiscal regime.