BEIJING -- After several days of talks between European and Asian leaders, China apparently has allied itself with Europe in calling for a vigorous system of international regulation.

In closed-door talks with European leaders Friday and Saturday, senior Chinese officials said they would back Europe's effort to overhaul international regulatory systems, European diplomats present at the meetings said. China most strongly stated its position Friday in a talk between Chinese President Hu Jintao and José Manuel Barroso,...