# 227. Missing May

> The cover video was taken while returning from Qiandao Lake to Hangzhou in early May. The weather after the rain was very cool. I really love the mountain mist and greenery—quite a contrast to the intense heat of this weekend.

- Issue: 227
- Published: 2025/06/30
- HTML: https://weekly.tw93.fun/en/posts/227
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- Chinese original: https://weekly.tw93.fun/posts/227.md

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<small>The cover video was taken while returning from Qiandao Lake to Hangzhou in early May. The weather after the rain was very cool. I really love the mountain mist and greenery—quite a contrast to the intense heat of this weekend.</small>

> **Record the down-to-earth trending technologies seen every week, and publish them here after screening. If you find it good, you can follow this weekly to get update notifications.**

## Trending Tools

**Apple iOS 26 Library Sketch Design File**  
<https://sketch.com/s/f63aa308-1f82-498c-8019-530f3b846db9>  
The Sketch design library for Apple iOS 26 might be useful for those designing new software. Apple's "multi-device consistency" in the VR era—while I feel their designs aren't always great at first, I usually get used to them after a while.  
<img src="https://cdn.tw93.fun/blog/upic/x41EOB22.png" width="800" />

**Visualization of Subway Lines in Chinese Cities**  
<https://subway.cuvii.dev>  
A fun tool for map enthusiasts: visualizations of metro lines in Chinese cities. Hangzhou has more lines than I thought. You can choose a city and line to see detailed station routes.  
<img src="https://cdn.tw93.fun/blog/upic/v2STGN22.png" width="800" />

**LibreTube: Alternative YouTube Client for Android**  
<https://github.com/libre-tube/LibreTube>  
If you use Android, try this third-party YouTube client; the interface is quite beautiful.  
<img src="https://cdn.tw93.fun/blog/upic/ir9I3q22.png" width="800" />

## Just Looking Around

**Meituan Tech: Trusted Experiment White Paper**  
<https://tech.meituan.com/2025/05/22/meituan-ab-online-controlled-experiment-01.html>  
Meituan Tech is publishing a "Trusted Experiment White Paper," discussing various methodologies for experiments during business processes, from AB testing, randomized controlled trials, randomized rotation, and quasi-experiments. They are currently on part 06; worth a read.  
<img src="https://cdn.tw93.fun/blog/upic/ra2zxl22.png" width="800" />

**OpenAI's Practical Guide to Building AI Agents**  
<https://cdn.openai.com/business-guides-and-resources/a-practical-guide-to-building-agents.pdf>  
Worth a look; the PDF download link is above.  
<img src="https://cdn.tw93.fun/blog/upic/dblEnL22.png" width="500" />

**How we built our multi-agent research system**  
<https://anthropic.com/engineering/built-multi-agent-research-system>  
Claude also recently released an article on how they built their multi-agent research system. You can read it in comparison with the OpenAI guide. Time to catch up on some reading.  
<img src="https://cdn.tw93.fun/blog/upic/US9poC22.png" width="800" />

**Random Listening: Nicholas Tse's "Because of Love, so Love" on tape on a weekend night**  
Headphones recommended if you're in an office to avoid disturbing colleagues.  
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