(Yicai Global) Sept. 27 -- China's largest bitcoin trading platform, BTCChina, shut down its digital asset and yuan deposit functions at 12.00 p.m. Beijing time today and will cease all trading on Sept. 30 at 12.00 p.m. Beijing time, the company said in a statement online.

The platform's bitcoin mining pool will remain unaffected.

Users can withdraw their digital assets or yuan from the platform until 12.00 p.m. on Oct. 30, the statement said, adding that if users do not want to retain their cryptocurrencies, they should trade them for yuan as quickly as possible then withdraw the cash.

International users have been unable to withdraw yuan from the platform since Sept. 15, meaning they have had to switch to other trading sites, which are also due to close soon, or send their digital assets overseas.

BTCChina has adopted a 100-percent reserve system since the first day it was set up, so all Chinese users can withdraw their cash within 72 hours, the statement added.

The People's Bank of China and other departments issued risk warnings surrounding bitcoin and other digital currencies in early September, saying the emergence of a large number of financing activities through online token issuance was illegal and seriously disrupted economic and financial order in the country.