Phoenix Baker

Kuai "Jack" Meizheng: Piracy Criminal

Kuai "Jack" Meizheng is a piracy criminal based in Guangzhou, China. He is heavily involved in the illegal theft, distribution, and piracy of digital products. Please be careful of piracy criminals and scammers.
A screenshot of a Kuai "Jack" Meizheng's GitHub
In this article

We recently obtained evidence that an individual named Kuai “Jack” Meizheng has illegally pirated dozens of digital products, including Untitled UI, via his piracy website, ThemeHash. Meizheng was directly linked to the site through his personal email address and associated GitHub account.

We maintain a zero-tolerance policy toward piracy and believe individuals like Kuai Meizheng should be held fully accountable for their actions. This conduct is not only unethical—it constitutes a flagrant violation of our license agreement and amounts to wilful copyright infringement, a criminal offence under Chinese law, specifically under the Copyright Law of the People’s Republic of China.

We have engaged a Hong Kong-based intellectual property law firm we’ve worked with previously and are actively pursuing legal action, including filing criminal charges through the Shenzhen Court of International Arbitration.

Kuai “Jack” Meizheng

Note: Meizheng has cowardly deleted and/or anonymised many of his social media accounts since we sent a legal notice, including his GitHub.

We created this post to warn other creators about this individual and ensure that he does not have access to your digital products — he is likely sharing and/or selling them behind your back in piracy channels and we recommend revoking access immediately.

If you have received any suspicious emails or messages from Kuai “Jack” Meizheng, or have had your own products pirated by this individual, please report them to us via [email protected] so we can follow up.

More best practice guides

This post is an exert from Untitled UI Figma, the largest and most popular Figma UI kit and design system in the world. Untitled UI includes tips and best practices right in the Figma file to help you level up as a designer.

Untitled UI v7.0

Untitled UI Figma is the largest and most popular Figma UI kit and design system in the world. It's meticulously crafted with 100% Auto Layout 5.0, super-smart variants, Figma's newest variables features, and with accessibility in mind.

It's a great example of Figma design system best practices and is the most popular and highest-rated Figma UI kit on the internet with 2,200+ 5-star reviews!

Untitled UI was designed to be the "ultimate" UI kit and the perfect starting point for any kind of project—from beautiful marketing landing pages, all the way to complex dashboards and web apps—Untitled UI has thought of absolutely everything so you don't have to.

The team behind Untitled UI are constantly making updates and improvements to the UI kit and recently announced they've completely refactored Untitled UI to take advantage of Figma's latest features released at Config 2023, Framework 2024, Config 2024, and Config 2025. This includes all the latest Figma features such as color variables (dark mode), spacing, radius, typography, and effects variables, Auto Layout 5.0, min/max widths, Auto Layout wrapping, and much more.

They've also released Untitled UI Figma PRO LITE, which is a premium and lightweight version of the full Untitled UI Figma PRO STYLES kit and have included it for free. It's 55% lighter, faster, and is designed to include everything you need and nothing you don't. It's perfect for moving fast and for smaller projects!

You can check out a full preview of the design kit, or check out the 100% free UI kit here (which is more advanced than most UI kits in its own right!). If you're short on time, here's a 60-second overview:

Untitled UI blog

More design resources and tutorials

In-depth design tutorials and the best quality design and Figma assets curated by the team behind Untitled UI.
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Untitled is the best $129 I've spent on my business in a long time. I'm going to keep using it and recommending it to every designer I know.

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Sam Pierce Lolla
Founder, Shuffleboard
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Gumroad 5 stars

Over the years we've featured hundreds of UI kits on UXCrush, but Untitled UI is by far the most comprehensive and detailed I've seen yet. A must have for any designer!

Luca Vavassori
Luca Vavassori
Founder, UXCrush
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Gumroad 5 stars

I've used all UI kits on the market. I can say without a doubt that the Untitled UI kit is the best on the market. It covers everything a designer needs in a modern and efficient way.

Murat Alpay
Murat Alpay
Product Designer, @imuratalpay
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Incredible, and keeps getting better. I’ve tried dozens of UI kits and Untitled UI is the only name you should care about. It stands head and shoulders above the rest.

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Designer, @jrmyfranck
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Such a beautiful, detailed, and extensive UI kit. Untitled UI is the perfect foundation for any project. I highly recommend this huge time saver.

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Untitled UI has been an amazing resource that I'm learning to rely upon to spin up ideas in no time. I think I might launch a startup pretty soon by mistake here!

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Senior Product Designer, Spotify
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The sheer scale, details, and organization of this kit is mind-blowing. It covers nearly everything a Designer could need in a modern, efficient and systematic way.

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I'm super impressed with this. I love poking around in other peoples UI Kits to see how they think. This is probably one of the most comprehensive I've seen.

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I'm super excited to use this for quick mockups of ideas in Figma. We're always trying to streamline our design process so we can move fast! Definitely recommend.

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Untitled UI is easily the best UI kit I've used so far. It has an insane amount of components that are all incredibly well-built. I don't even know how many hours this will save.

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Founder, NewPulse Labs
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The attention to detail and thought Jordan has put into this UI kit is unparalleled.

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Untitled UI is incredibly well-organized and the attention to detail is great. I highly recommend this kit to any designer that wants to create beautiful designs fast.

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What an awesome Figma kit... it's an absolute game changer. This is the perfect base for any design system. The size and attention to detail is next level.

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We've been using Untitled to build Himalayas 2.0 and have finished a complete redesign in just a few days. It has everything we need already pixel-perfect.

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