How does the Grapefruit app pull black friends? How to remove a friend from the blacklist

How does the Grapefruit app pull black friends?

1 Open the Grapefruit, click on the bottom of the "she her Circle", and then click on Open the post (pictured below)

2 Click Pull Black Friend's avatar, then click on the top right corner of the "three points";(the following figure)

How does the Pomelo app remove the best friend from the blacklist?

1 Open the Grapefruit, click on the bottom right corner of "I", and then click "Settings";(the following figure)

2 Click "Privacy", then click on "Blacklist";(the following figure)