Why AI-Driven Product Notes Need More Than 200 Characters

The Surprising Data Behind XHS Sales Success

Recently, an interview with the founder of Relo, a sports apparel brand on Xiaohongshu (XHS), revealed some fascinating numbers. Relo, which sells athletic underwear, has hit monthly sales of ¥5 million on the platform. After extensive A/B testing of product notes, they found that the highest-converting posts always had more than 200 characters of text and at least 8 images.

This flies in the face of what most brands think today. Everyone's obsessed with shrinking attention spans. They tell you to hook users in three seconds, keep it short, keep it light. But here's the thing: users don't mind reading if they're about to buy something. They just don't want to wade through fluff.

Why Short Copy Fails for New Brands

Relo's founder made a great analogy: a product note on XHS is like a street stall. When a user stumbles upon your note, they've likely never heard of you. They won't dig through your profile to read your previous posts. That single note is your only shot.

On WeChat Moments, you can tell a story over several days because people know you. In a livestream, you can repeat yourself. But in the XHS feed, there's no context. The next swipe might be a competitor's ad. If you don't explain your product clearly, the user just moves on.

Short copy only works if the user already knows your brand, or if the product is so simple it needs no explanation. For new brands, new categories, or high-consideration purchases, going short is basically betting on brand recognition you don't have yet.

Click-Through Rate Isn't the Real Goal

Teams obsess over click-through rates. They polish covers and headlines, then treat the body copy as an afterthought. But when someone clicks on a post titled “How to Avoid Chafing When Running,” it doesn't mean they've decided to buy your underwear. They're just interested in the problem.

They need to know why regular underwear chafes, what material you use, how the cut differs, whether it works for long runs, if it holds up after washing, and why it's worth the price. If that info isn't there, they'll exit and search again. And in the search results, they'll see all your competitors bidding on the same keywords.

This is a common pitfall: your content sparks demand but fails to give a reason to choose you. The note feels so native that the product only makes a cameo. The user remembers they need a solution, but they don't remember your brand. You've basically paid to advertise for your competitors.

200 Characters Isn't a License to Brag

Don't misinterpret this as “write long essays and stuff in every feature.” Relo's other insight: even if your product has ten strengths, pick one and go deep. For their running underwear, they'd focus solely on chafing during long runs.

They'd cover why chafing happens, who's most affected, what the fabric and seams do differently, what a 10K run feels like, which body types it suits, and the price. All of that revolves around a single problem, so 200 characters never feels bloated.

Most brand copy is boring not because it's long, but because it's disjointed. One paragraph talks about fabric, the next about design, then suddenly it's about lifestyle, and it ends with a brand slogan. There's no thread.

The goal is to control the scope of your communication. One note, one problem, from the user's pain point to your solution. The user doesn't need to remember ten features; they just need one clear reason to buy.

That's the sweet spot between hard sell and soft sell. Don't cram the product in from the first sentence, but don't leave the user wondering what you sell either. Start with a real scenario, walk through the problem and experience, then naturally bring in your product's differences, evidence, and purchase info.

Images That Explain, Not Just Pretty Pictures

Relo also found that top-converting notes often use 8+ images. But it's not about shooting the same product from eight angles. The first image should make the target user recognize their problem. The next ones can show the use case, product details, functional proof, on-body shots, real user experiences, and pricing.

People scan images fast. When each image has one job, it's easier to process. Many brands try to cram everything into a single graphic: product name, five features, specs, logo, discount, and a call-to-action. That's a mess. Nobody knows where to look first.

Eight images give you room to tell a coherent story. The scene image pulls them in. The detail image explains the difference. The experience image builds trust. The final image delivers the price and purchase path. Follow that sequence, and the product's value compounds.

Not Every Product Needs 200 Characters

Of course, this isn't a universal rule. If you're selling a $5 item where the style, effect, and price are obvious, don't pad it. For established brands with familiar products, you can lean on existing awareness.

But for new products, new brands, high-ticket items, complex tech, or anything that requires comparison, you need fuller content. The more unfamiliar the product, the more basic info they need. The higher the price, the more objections you need to overcome.

Here's a simple test: pick similar influencers, the same core selling point, and similar covers. Run two sets of notes—one with short copy (just the scenario and a quick review), the other with complete details (evidence, experience, fit, purchase info). Beyond clicks and likes, track search lifts, store visits, saves, add-to-carts, and actual sales.

What you want isn't a note that's easy to finish. It's a note that helps someone make a decision.

AI Can Help You Write Better, Not Just Faster

This case study is gold for anyone using AI in marketing automation. The platform's algorithm has trained us to obsess over clicks, but AI can help us go deeper. Instead of just generating short, catchy copy, AI can analyze customer questions, extract key objections, and structure a 200+ character note that covers everything a buyer needs.

AI can also personalize content at scale. For a high-ticket product, it can generate multiple versions, each focusing on a different pain point, and test which one converts. It can even suggest image layouts that guide the eye from problem to solution.

The core lesson from Relo isn't the exact word count or image number. It's that users are willing to spend time on content that gives them the information they need to commit. In an age of AI-generated content, the winners will be those who use AI to deliver substance, not just speed.

As AI takes over more of the content creation process, remember: a note that looks effortless but leaves the user searching for five competitor reviews isn't doing its job. It might get read, but it won't get sales. Use AI to build trust, not to churn out fluff.