The Trump administration will impose a 25 percent tariff on an additional $16 billion in Chinese goods, the U.S. trade representative said Tuesday, ratcheting up international tension.

The tariffs – which will hit products like fertilizer, electrical generators, and railway freight cars – are the second round against China to take effect. Duties were added to $34 billion in imports from the communist nation in July, and Beijing has vowed to impose dollar-for-dollar retaliatory tariffs on $16 billion in U.S. goods.