Sheng Zhong

@sundayrobotics Robotics Research Engineer, ex-Cruise, UMich Robotics PhD

[Sheng Zhong @johnson_zhsh]

A friend was surprised I've done "design" work in my spare time, thinking it's too fluffy. But design is just conscious decision-making to achieve a desired effect.

[Sheng Zhong @johnson_zhsh]

The project I've been leading is done, and it's already a big unlock for the company. Can't share details yet, but announcements soon from @sundayrobotics !

[Sheng Zhong @johnson_zhsh]

Welcome to the team 🦾!

[Junyao Shi @JunyaoShi]

Personal update: I've joined @sundayrobotics.

Two questions ran through my whole PhD: how to learn from scalable human data, and how to build general-purpose robots.

Trying to answer them convinced me of one thing: general-purpose robots will never come from better models alone. It takes tight iteration across data, hardware, model, control, and evaluation. Every loop you can shorten matters.

My first dinner with @tonyzzhao and @chichengcc turned into a four-hour conversation. I walked away realizing how much we saw eye to eye: scale the data, think full-stack, start from the problem you want to solve instead of the idea you want to win.

So getting to work at Sunday is a dream come true, a place to solve generalization with the full breadth of human data and system-level thinking, and keep chasing the questions I care most about.

After my first month in, two things stand out: Sunday’s full-stack team iterates unbelievably fast, and the energy when everyone is aligned on the same vision is electric. This speed and energy is exactly why what used to feel impossible now feels close.

Home robots, the frontier physical AI in the hands of ordinary people, were long seen as a distant dream . At Sunday, I watch this dream take shape every day. I'm convinced there's real research-market fit here: foundation models and home robots point toward the same north star, generalization, not specialization, because every home is different.

Excited for the zero-to-one moment ahead.

[Sheng Zhong @johnson_zhsh]

@Gregorein Anyone considering LOC as a serious metric is a self-report

[Sheng Zhong @johnson_zhsh]

Thanks for the shout out! I don't have premium so can't post as long of a post

[Ryohei Sasaki@engineer @rsasaki0109]

pytorch_volumetric
Volumetric structures such as voxels and SDFs implemented in pytorch
https://t.co/kxNIC8VVH2
- signed distance field (SDF) pytorch implementation with parallelized query for value and gradients
- voxel grids with automatic expanding range
- unidirectional chamfer distance (points to mesh)
- robot model to SDF with parallelized query over robot configurations and points

SDF slice animated over a KUKA robot

[Sunday @sundayrobotics]

Memo on @Nasdaq today!

[Sheng Zhong @johnson_zhsh]

Really looking forward to when memo can wash their own hands!

[Shy Yang @shyyang]

We believe that in a world where robots are everywhere, robots should be friendly, familiar and most importantly, huggable

[Perry Jia @perryzjia]

Thank you @NasdaqExchange for featuring us today!

[Sheng Zhong @johnson_zhsh]

@conductr_ Sick cover art

[Sheng Zhong @johnson_zhsh]

pytorch kinematics 0.9 out with torch.compile support!
Differentiable FK and jacobian calculation and with batched IK on the GPU.

pip install pytorch-kinematics

https://t.co/8hmhccSgBG

[Sheng Zhong @johnson_zhsh]

Definitely takes a while to get used to, but with UMI style data collection the demonstrator is the one closing the embodiment gap

[Soon @soontechnology]

Gathering training data for Memo can be harder than expected.

Watch the full video here: https://t.co/7JyVMtoGUh

[Sheng Zhong @johnson_zhsh]

Very fortunate that we have an amazing design team @sundayrobotics

[Shy Yang @shyyang]

Cutemaxxing is the design brief @sundayrobotics

[Sheng Zhong @johnson_zhsh]

At @sundayrobotics we have aluminum memos instead of rubber duckies

[Sheng Zhong @johnson_zhsh]

@henry_yu_01 @sundayrobotics @tonyzzhao @chichengcc @clayhaight By this rate it'll take us about 3 years to equal the size of California

[Sheng Zhong @johnson_zhsh]

Really exciting to work so closely with a robot and iterate on ideas quickly!

[Tony Zhao @tonyzzhao]

We raised $165M at a $1.15B valuation to stop doing demos.

2026 is about 1) deployment and 2) research. We will start shipping Memo with our new frontier models in a few months.

Our series-B is led by Coatue, with Thomas Laffont joining the board. ->🧵

[Sheng Zhong @johnson_zhsh]

Dusting off my account as we enter a new age of automation, but I guarantee 100% of my posts will be entirely written by myself.