The brand is obviously very popular in China, they make quite a few models mostly 150-125cc, in offering a 200cc and with EFI they can keep the offering affordable and with improved gas mileage, the new models offer practicality and also functionality.

They have a very complex website, it may be over compensating for its pretty conservative product line? http://www.gzdayang.com/

The new offering are not on the site, likely not in the market yet? The Chisel X200 will likely sit in pricing under the Jialing 223 offerings and the Zongshen RX3, but offer similar functionality. Both the Jialing and Zongshen went with Delphi for their EFI were whom Dayang uses is not clear, Qingqi is using Siemens.

Dayun began working with Freescale and Electrojet as early as 2008?
http://www.electrojet.org/
http://www.freescale.com/