Ding Dong! Delivery Training in Progress Event Guide for Zenless Zone Zero
Ding-Dong! Delivery Training in Progress is a new Bangboo Event in Zenless Zone Zero. Bangboo have a lot of wishes, and they need someone to help them out!
Ding-Dong! Delivery Training in Progress Event
This event will take place during version 3.1 of the game, from August 28 until September 14, 2026.
Ding Dong! Delivery Training in Progress Event Calendar for Zenless Zone Zero
What is the Ding-Dong! Delivery Training in Progress Event About?
The WIsh Post Office is currently swarming with Bangboo that are hoping to get a dream delivery! Maybe the Proxy can discreetly help with that.
How do you Participate in Ding-Dong! Delivery Training in Progress?
In order to participate you will need to reach Inter-Knot level 20 and complete the Main Story Chapter 1 Intermission.
During this event, Bangboo will send in various wish letters to the WIsh Post Office. But if no one answers those letters, how are the Bangboo going to see their wishes come true? Time for the Proxy to jump in and grant some Bangboo wishes!
Head to Booastrum District and talk to the Bangboo to start the event. This event is similar to previous ones we had. All you need to do is log in every day and spend your battery. You will obtain one wish letter for login in, and one wish letter for spending your battery once per day. You then just have to hand them in at the Bangboo in Booastrum to collect your rewards!
What are the Ding-Dong! Delivery Training in Progress Rewards?
During the event, you can earn the following rewards:
- 420 Polychrome
Changelog
- 29 Aug. 2026: Event guide updated.
- 23 Jul. 2026: Event guide added.
Written by Jaymo, a longtime gamer who spends way too many hours exploring open worlds, grinding in MMOs, and pulling for his favorite gacha characters. He covers news and guides for all kinds of games, and just likes helping people enjoy them more. You can find him hanging out on Twitch or chatting in Discord (jaym0).
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