Hello jiangqy,
Thanks for sharing the code. A quick note, to mention that the code could be improved by using a few tricks here and there, in 20 epochs.
Using an updated code and the exact same data as you, I get an accuracy of 0.933. Note that I got the same accuracy as described by you in your Readme the first time I ran your code.
Let me know if you are interested in updating your code and I can start a pull request. If not, I would like to then create a repo if this example and the updated code, mentioning you and your repo as well of course.
Cheers!

Hello jiangqy,
Thanks for sharing the code. A quick note, to mention that the code could be improved by using a few tricks here and there, in 20 epochs.
Using an updated code and the exact same data as you, I get an accuracy of 0.933. Note that I got the same accuracy as described by you in your Readme the first time I ran your code.
Let me know if you are interested in updating your code and I can start a pull request. If not, I would like to then create a repo if this example and the updated code, mentioning you and your repo as well of course.
Cheers!