Dear Ashwin
Many thanks for visiting our website and your interest into our service. My name is David and it's my pleasure answer your China tour questions.
For a 2-3 days short tour, we will suggest your visit Beijing or Shanghai. These citise are very popupar and also have the 72hr visa free policy.
Below are some tour packages for your reference
3 days Beijing Tour
3 days Shanghai Tour
Hope the above tour package can meet your requirements. And if you want to visit other places, you can also feel free to let me know and I will be glad to offer you more choice.
Best regards
David