How to install 230V Light with Light-activated-resistor?
This leaflet just contains some general information concerning the product. The only thing relevant to installation is in point 5 (labeled 五). 

Basically, the user is told to connect what are literally labeled as the "fire wire" and "null wire" (火线 and 零线) -which I interpret as respectively the red and the black wires- to an AC supply of 180 to 250V, 50 to 60Hz frequency, where the device should happily consume less than 60W of power. 

This agrees quite well with what is on the bottom of the box.

This device does not need an earth connection, since the enclosure is plastic. Earthing is used when the container is metal, and the user could receive a shock if a live wire was touching the interior. 

In addition, please note the timing seems to be able to be graduated, from 50 +/- 20 seconds.