Speaking on behalf of PwC, Neil Hampson, a partner at the firm, said: "We are shocked by this tragic news. Ying was a bright and popular colleague with a promising career in front of her. She excelled at everything she did, with a passion for life, for work and for the friendships she made.
"It is a tragedy that a wonderful young woman should lose her life at such an age. Our thoughts go out to Ying's family and friends and we will do anything we can to help her family at this very sad and difficult time."
Ying is the eighth cyclist to die on London's roads so far this year and the seventh involving a lorry.
City of London police are still investigating the incident. No arrests have been made.
Below is a map of all the cycling accidents in London in 2013: