Is there anyone can help explaining these things?
These are the issues reported by Shopify in the App submission: -
1) Apps that falsify data to deceive merchants or buyers - These apps violate part C - Section 2.3 of our Partner Program Agreement as well as Section 6 of our Acceptable Use Policy.
2) Any connection that your app makes from its UI to either link to another shop or install other apps must go through the Shopify App Store listing first.
3) Section 8A from link