I made a mistake last week. Thanks so much for the mentor pointing out my mistake. I filled in the wrong data in the screenshot of the blog for testing. The mentor found the problem after reading, and we spent a long time discussing related content. I placed the field that should be defined on the property entity incorrectly on the property bundle.

After I changed the Property entity and Thing entity to support bundles last week, I had a problem. When I created a thing, I couldn't add a property by Autocomplete. 

I then add properties when I create a thing. It's going to look something like below, it doesn't show the property that I've created for me to select.

This is the definition of the properties field in the screenshot: 

  This is the second week of coding for the GSoC project. Mentor advised me to create the Thing Entity and Property Entity last week. So, I created these two entities and created the test data. This week I showed to mentor the response in API. The response in API like bellow.

  When coding started, I have a problem, that is how to create a Thing with properties/actions/events.  How can I get the data to result If no data input? 

First of all, I would like to thank the Drupal organization for giving me this opportunity to participate in the Google Summer of Code. Before starting coding, there is a period of Community bonding. The following is a little summary of the period

During The community bonding period, my mentor thinks that learning a song can help improve my ability of public communication, so I learn The song Love The Way You Lie. It's a challenge for me.