You can reach Kaifeng with high-speed trains from many major cities in China.
From Beijing, you can get from Beijing West Station to Kaifeng North Station within 4 hours twice a day. You can also take a train to Zhengzhou East Station and then take a connecting train to Kaifeng. From Shanghai, you can get from Shanghai Hongqiao Station directly to Kaifeng North Station within 4,5 hours four times a day.
You can check train connections and book tickets in English via http://english.ctrip.com. Please note that you need to arrive about 1 hour before departure time of your train at Chinese train stations to collect your printed ticket and to go through a security check (similar to airports).
After your arrival in Kaifeng, please take a taxi to the conference venue (or your hotel). Show the driver the address of your hotel. The taxi ride from Kaifeng North Train Station to the hotels should be about 15 RMB (2 Euro or 2,50 USD).
For the Lavenda Dream Hotel
For the Central Capital Hotel