The puppets hanging backstage caught my eye. They resembled puppets from Quanzhou, marked by their protruding earlobes and double chin. These characteristics are seen in Buddhist religious figures too (Ruizendaal 2006, 118-119).
Double chin, more obvious for the young male/sheng character seen here
For a good read on Quanzhou puppets, I will recommend Robin Ruizendaal, Marionette Theatre in Quanzhou (Brill, 2006). http://www.brill.com/marionette-theatre-quanzhou
The puppet theatre in Quanzhou has received international acclaim for its exquisite string manipulation of 36 strings or more. In the Singapore case, there are only about 10-12 strings. It is believed that the more strings there are, it allows the puppeteer to better present the delicate movements of the puppet.
According to Ruizendaal, the term "Jia Li" (ka lei in Hokkien) as seen in the troupe name of Xiao Feng, may refer to "excellent rites theatre" or "additional rites theatre" (Ruizendaal 2006, 184). The term "Ka lei" has become commonly associated with string puppet theatre in Singapore.