"China to inject US$174 billion of liquidity into markets amid new coronavirus outbreak"

Big money.
This is about five hours old so markets have had time to digest the info but it is still big money.
From the South China Morning Post, 8:16pm, 2 Feb, 2020:

• China’s central bank has announced it will inject 1.2 trillion yuan (US$174 billion) into markets via reverse repo operations on Monday
• Investors are bracing for the worst when markets resume following a new coronavirus outbreak that has dented China’s economic activity

China’s central bank will pump 1.2 trillion yuan (US$174 billion) into financial markets on Monday, as part of an effort by regulators to mitigate volatility when trading opens against the backdrop of a new coronavirus outbreak.

Investors in Shanghai and Shenzhen are bracing for a possibly brutal return to trading when markets resume for the first time since the Lunar New Year holiday.

The outbreak of a novel coronavirus, which has killed at least 304 people and infected more than 14,380 in mainland China, has ground economic activity to a near standstill 

in China, as authorities take aggressive measures to contain the flu-like disease, curbing public transport, shuttering entertainment venues and shortening business hours.

In the face of the “epidemic situation”, the People’s Bank of China (PBOC) said on Sunday it would “inject 1.2 trillion yuan via reverse repo operations on February 3 to ensure sufficient liquidity supply.”...MORE

 It's 2am Feb. 3 Beijing time, let's see how this works out..