Here is a handy reference to the steps taken so far by Chinese authorities to stabilize FX and stock markets

Its via Reuters, and stretches back to November 18 2015 (and is up to date as the latest policy moves last week).

Following is the timeline of Beijing's market-stabilising measures, reforms and statements.

** Jan 18 - The People's Bank of China (PBOC) said it will start implementing a reserve requirement ratio (RRR) on offshore banks' domestic deposits as of Jan. 25.

** Jan 15 - The China Association for public companies (CAPCO) called on major shareholders of listed firms to work together to stabilise the stock market.

** Jan 8 - The State Administration of Foreign Exchange (SAFE) has ordered banks in some trading hubs to limit dollar purchases this month, in the latest attempt to stem capital outflows.

The link to the full list is here.