A Simple Analysis - Side by Side comparison 
In the art piece, It is quite clear from their look that
they are dragon of cleanliness and litterbug, and they are linked together.
They seem to be good friends in art piece but in clean Hong Kong campaign history, they have always
been enemies.
From the comparison above, the red spots on litterbug turned into red dollar signs. Which
may symbolize litterbug get a lot of money in HK, he is also holding a glass of
red wine which symbolize wealth and higher class. This means litterbug could be
someone like tycoons that have a lot of money, greedy and drink red wine.
Litterbug has its pointed canines and pointed tail which means it is quite
devil like. The red liquid in glass wine may also mean blood that litterbug is
getting all the money from citizens. In Chinese we have a term called (血汗錢) which means very hard-earned money. In
Chinese it means the money comes from blood.

It seems like dragon of cleanliness on the left while it is
wearing a bowtie that points directly to someone we are familiar with “Bowtie”
Donald Tsang. We can further be sure about the character when you see the logo
HK on the cleaning gown, he was the chief executive of HKSAR. The word printed
on the cleaning gown says清洁大队长which
means清潔大隊長 that
means it is really Donald Tsang because of his identity in 2003. The five
Chinese characters are in simplified Chinese, this also symbolize Donald Tsang
relation with Mainland China
or even Central Government.
Feb 2012 Donald Tsang was in a series of scandals about him
getting special services from
Macao
during his trip there. As
Macao is more
pro-china and many of its places now use simplified Chinese that makes us
wonder if the artist try to draw attention to the
Macao incident.