Got stumped by the tech director during last week's proposal
Last week I was pitching an AI automation proposal to a client when their tech director suddenly asked: "You said GPT helps screen resumes — how does it actually do that?" I froze for three seconds and laughed it off with "mainly keyword matching." On the way home I thought: how dare I make promises to clients when I don't even understand the underlying logic myself?
What AI by Hand is: pen, paper, and neural networks drawn out for you
It's a free learning resource on byhand.ai. The author uses Excel tables, hand-drawn block diagrams, and slow-motion formulas to walk through every step from input to output. I assumed I'd need linear algebra to get started, but the author used food delivery orders as analogies — and I actually kept up.
My friend Jessica, a Xiaohongshu creator who ran daigou for three years before pivoting to AI teaching, told me after watching the first few episodes: "Now I finally get why GPT sometimes goes off-track when I ask it to write copy." Now she always asks one extra question in her deliverables — "what's the logic behind this step?" — and clients trust her more for it.
Replication cost: basically free, but you need to slow down
Money: 0 yuan, the website and YouTube are all free.
Time: about 1.5 hours if you watch all 5 episodes straight, but budget a full weekend to actually digest it.
Technical barrier: high school math is enough. The author redraws every step at the slowest pace — it's not aimed at programmers.
First step: YouTube search "AI by Hand" channel, click the episode with the highest views, start watching at 1.25x speed.
Honestly, I had to watch episode 1 twice — the second time I grabbed a pen and drew along. I got this step wrong: I thought I could just lie back and listen once and absorb it. Brain didn't follow at all.
How three types of people should use it — and whether to learn
Just starting out / still landing your first client: If you haven't even saved a few prompt templates yet, set this aside for now. Get your basic workflow running first.
Already have 1-2 clients: I'd suggest spending one weekend on the first 5 episodes. Not to play expert — but so you stop getting snowed. The clients you're working with now are starting to ask "why."
Scaling up / want to build an AI course or IP: This hand-calculating method is gold for content. I've been thinking about breaking it into a Xiaohongshu series — way more differentiated than just talking about prompts.
One last thing: it's not something that'll turn you into an expert overnight, and it's not about outsmarting anyone. It's just a slow textbook that gives you one more layer of confidence. After watching, you still won't know everything — but at least you won't get shut down by a single "it's a black box."