On Section 2.6,
for Date, type in your date of entry and exit from China as year/month/day format as stated in your invitation letter.
for Detailed Address, type the name and address of the hotel you'll be staying at in China. You need to list only one hotel even if you are staying at multiple hotels. The hotel must be in the city where your invitation letter states your business meeting is taking place. Use all lines in the section if necessary to fit the information.