The State Administration of Foreign Exchange (SAFE) said in a statement yesterday that it had investigated six companies suspected of illegal forex transfers in the southern city of Shenzhen.
An unspecified number of other firms were found to have used false documentation, fabricated trades, and other methods to funnel money out of the country, the forex regulator said.
These include "ant moving" -- the process of transferring large sums of money out in small portions to avoid detection.
"At the same time, (we) will increase policy transparency and promote financial markets' opening to the outside world."
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A huge wave of overseas investment last year by Chinese companies seeking better returns abroad prompted the government to rail against "irrational" spending.
It began rolling out a series of restrictions on overseas money movements as leaders grow increasingly concerned over capital flight, slowing domestic economic growth and a weakening yuan currency.
China's vast foreign exchange reserves in 2016 fell below USD 3 trillion for the first time in six years, as the authorities spent heavily to prop up the value of the yuan and cut down on outflows.
In February, SAFE approved $89.2 billion in investments by Qualified Foreign Institutional Investors in the country's onshore financial market as of February 24, it said, up from $87.31 billion in January.