EXCLUSIVE: China demands copper supply commitments for Anglo Teck merger approval, sources say ↧ ↧ EXCLUSIVE: China demands copper supply commitments for Anglo Teck m... China's antitrust regulator has asked Anglo American to commit ​to supply the country with a steady flow of copper concentrate as a condition for approving its proposed $54 billion ‌merger with Canada's Teck Resources , three people aware of the development said.