Boosts

In Hidden City there are a wide variety of boosts available, a player earns them by completing quests, collections, and artifacts. You can find these boosts under your inventory then clicking on "boosts"

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Great Tailsmen of Truth
The first boost you are introduced to in the game is called the "Great Tailsmen of Truth"

It's part of the Daily Quests, you sign in and at the end of 5 days in a row, you receive one part of the Tailsmen.

It'll take you 25 straight days of signing in to complete this.