Short answer: nothing. 68 NiuNiu is a Telegram Mini Program. Install Telegram and you are done — Android and iOS follow the same path.
The install step simply does not exist.
68 NiuNiu runs on Telegram Mini Program, so there is no separate app — you play inside Telegram. The only thing to install is Telegram itself, from the App Store or Google Play.
With Telegram installed, open our Bot, tap Start at the bottom, and once it replies tap the start-game button in the lower left to reach the main screen.
One path, no branching.
Since there is no app, an installer did not come from here.
Because 68 NiuNiu has no standalone app, any file claiming to be a 68 NiuNiu installer or APK did not come from this flow. Think about who handed it to you before installing anything.
By the same logic, anyone asking for your password or verification code is a scammer. Support never asks.
You still need the group to play.
Once you reach the main screen, work through registration, identity verification, device binding, the fund password and a first top-up. Enter referrer UID 8228544698 at sign-up.
With the account open, rounds run inside the 68 NiuNiu interactive group on Telegram — bidding, betting and grabbing packets all happen there.
The registration guide walks all five stages with real screenshots, and the referrer UID is on that page.