Fare for hong kong- shanghai high speed train in december? shangai-beijing in december?

From Kowloon [hong Kong] to Shanghai, there ia only one train available, T100(15:15/10:08+1). The price for soft sleeper is CNY731/US$122, and CNY456/US$76 for hard sleeper. From Shanghai Hongqiao to Beijing South, there are many daytime high-speed G-trains available. The price for First Class Seat is CNY933/US$156, and CNY553/US$93 for Second Class Seat.