halfelf | 6 years ago | on: Mathematics all-in-one cheat-sheet (2013) [pdf]
Find a bug in page 39: y' is Lagrange's notation while dx/dy is Leibniz's.
halfelf's comments
halfelf | 7 years ago | on: A Heavily-Commented Linux Kernel Source Code [pdf]
Chinese reader here. When I was in college about 11 or 12 years ago, a previous version of it is considered as one of our textbooks for the Operating System course. Most assignment and homework is about to add or modify some modules into kernel 0.11.
halfelf | 8 years ago | on: Do you need a VPN?
The most terrible fact about GFW is that it makes people forget they have a chance to access the other part of internet. Most netizens here don't even have a idea to cross it.
halfelf | 8 years ago | on: A Little Story About the `yes` Unix Command
Once read similar things before, on reddit: https://www.reddit.com/r/unix/comments/6gxduc/how_is_gnu_yes...
halfelf | 8 years ago | on: Apple Pulls 60 VPNs from China App Store
Very sad. Though I have an alternative apple account outside CN, prepared for this long time ago, it still brings me some inconvenience. These days you can't trust any mega corp, they will eventually store our (Chinese citizen's) data in CN.
Another explanation is the upcoming 19th National Congress of CCP. Recently many policies have been published to restrict freedom of speech, indicating the leader now might desire another 5 year presidency.
halfelf | 8 years ago | on: Visiting Chinese Megacities
Zhengzhou was a ghost city and hasn't been a capital for more than 2000 years. Its developing to major city in China in the modern sense only begins in 20th century, after the railway traffic prosperous here.
halfelf | 9 years ago | on: China, Not Silicon Valley, Is Cutting Edge in Mobile Tech
In CHN, lacking of credit card and personal credit records make internet industry find a efficient and fast way to receive payments —— that's why alipay and other third party payment such popular. Although just some Paypal copies in the beginning, they are such behemoths now.
halfelf | 9 years ago | on: China is challenging the idea that censorship thwarts online innovation
Though as a Chinese programmer, I have no doubt we will achieve some great innovation here, the author of this report apparently doesn't know internet industry well, for choosing a bad example. Xu Dandan himself is just a joke here, and himself is widely considered as a bragger.
halfelf | 10 years ago | on: From Gongkai to Open Source (2014)
Ha, you western guys just talk like us. I never think highly of Chinese innovation, there's just pirate. It's much more easier to protect your innovation in west, therefore easier to publish your innovation.
halfelf | 10 years ago | on: A first look at the OS the Chinese government wants to replace Windows
The original Red Flag Linux is ended in 2014, due to fail to get government subsidy. This is recorded on both Chinese and English wikipedia. And in later 2014, another company bought the remnant of Red Flag Linux and continued publishing it till now, though I don't know anyone still using it.
halfelf | 10 years ago | on: Amazon Web Services in Plain English
Thanks for sharing. It's feeling like I've just weared some magic glasses for auto translating.
halfelf | 10 years ago | on: “Two days ago the police came to me and wanted me to stop working on this”
Working in such network 24/7/365 means I have to spend about $90 per year on my vpn service, and keep vpn connection all the time when working. (otherwise google and SO will not come to save me from problems.)
halfelf | 10 years ago | on: “Two days ago the police came to me and wanted me to stop working on this”
That's true. But immigration for Chinese is much more harder than you think. Even in China, it is not completely free to move from one province to another.
halfelf | 10 years ago | on: “Two days ago the police came to me and wanted me to stop working on this”
If this happens day to day, you may consider opening a subsidiary in China, with applying for special network. Foreign company in China can have network without GFW.
halfelf | 11 years ago | on: Show HN: Learn Chinese Through Novels
Chinese is not only about written language. Actually there are two grammar system, written and spoken language. One can learn how to read through novels but not how to speak.
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