BEIJING—Europe remains a key market for China’s foreign-reserve investments, Chinese Premier Wen Jiabao said after meeting German Chancellor Angela Merkel, adding that China will keep its macroeconomic policies stable in the second half.

Mr. Wen’s comments, carried by the state-run Xinhua news agency, echo other recent statements by China’s government reaffirming the euro’s importance. The remarks come amid concern that Europe’s debt troubles could lead China to scale back investment of its foreign-exchange reserves—the biggest in the world, at nearly $2.5 trillion—in euro-denominated assets. In May, the State Administration of Foreign Exchange, which manages.