Hi Mr. Vinit-
There are many ways to go to Shaoxing from Hong Kong.
By Air- U can fly to Hangzhou(Xiaoshan Airport) by Dragon Air & China Eastern Airlines.
And You can come to mainland (Shenzhen or Gaungzhou)from HK by Train or Bus (2 to 3 Hours by Max) and can get Domestic flight from there to Hangzhou. It depends upon the Discount and spome times u may get a very good deal. Hangzhou Airport is just 45Kms from Shaoxing for which there a Shuttle bus for every 30 Minutes.
Also You can take a Train from Guangzhou to Shaoxing which is about 17Hrs tarvel time.