In case of a TOURIST (GROUP) visa you can print the digital copy in black and white. You will also recieve a colour copy by DHL courier, together with your official visa.
You must bring both the copy and the original document to customs in order to enter the country!
In case of a BUSINESS VISA ON ARRIVAL you have to print the visa in colour!
You must bring the colour copy to customs! You receive the official visa at the border on Pudong airport in Shanghai.