Chinese foreign exchange reserves stood at $3.09 trillion by the end of September, up by 0.6 percent from the beginning of this year, the State Administration of Foreign Exchange reported on Sunday.

In September, the US dollar index rose and bond prices in major countries declined, influenced by factors, including global economic growth, monetary policies of central banks of major countries and global trade situations, according to a statement on the SAFE's website.

The combined impacts of exchange rate translation and asset price changes have led to changes in China's foreign exchange reserves, said SAFE spokeswoman and chief economist Wang Chunying.

The foreign exchange market in China also remained stable last month, Wang said.

Looking ahead, unstable and uncertain factors in the global economic and financial environment are increasing, along with slowing global economic growth and more volatile global financial markets, she said. "But China's economic development maintains great resilience, and sound growth momentum in the long term has never been changed."

Wang added that the all-around reform and opening up will continue, which will strongly support the stability of China's foreign exchange reserves, the world's largest.