JJohn's Blog
HomeArticlesSubscribe

All Articles

829 posts

Language:
中文English
Category:AllAI Deep DiveBooks & IdeasEngineeringIndustryLife NotesStartupWritingZhihu Q&A
[Thought] Many viruses you’ve probably never heard of also contain DNA, such as iridoviruses
Zhihu Q&AMarch 22, 2026

[Thought] Many viruses you’ve probably never heard of also contain DNA, such as iridoviruses

Many lesser-known viruses carry DNA, including iridoviruses, baculoviruses, and hepadnaviruses, while many others—such as HIV-1, coronaviruses, measles, influenza, and common cold viruses—store their

1 min
[Answer] What did you do on the night you checked your Gaokao score?
Zhihu Q&AMarch 22, 2026

[Answer] What did you do on the night you checked your Gaokao score?

I was so excited that I took a sleeping pill, and for the next two or three days I was in a haze.

1 min
[Answer] How Can You Score 130+ on the Gaokao Math Exam?
Zhihu Q&AMarch 22, 2026

[Answer] How Can You Score 130+ on the Gaokao Math Exam?

Do the questions worth 130+ points and make sure you get them all right.

1 min
[Answer] [College Entrance Exam Major Choices] Which Is Better: Computer Science, Electrical Engineering, or Mechanical Automation?
Zhihu Q&AMarch 22, 2026

[Answer] [College Entrance Exam Major Choices] Which Is Better: Computer Science, Electrical Engineering, or Mechanical Automation?

Overall, among computer science, electrical engineering, and mechanical automation, I would directly recommend computer science. This is based on the broader development trend of the industries.

1 min
[Answer] My gaokao score is only enough for Peking University Health Science Center, but I’ve adored Tsinghua since childhood—even the wall by my desk is covered with Tsinghua posters. Should I retake the exam?
Zhihu Q&AMarch 22, 2026

[Answer] My gaokao score is only enough for Peking University Health Science Center, but I’ve adored Tsinghua since childhood—even the wall by my desk is covered with Tsinghua posters. Should I retake the exam?

I personally strongly advise against retaking the gaokao. Sometimes a sentimental attachment is better left as sentiment; if it costs too much energy, the disappointment may only grow. At the level of

1 min
[Answer] How Can High School Students Learn Programming at Home?
Zhihu Q&AMarch 22, 2026

[Answer] How Can High School Students Learn Programming at Home?

If you're starting from zero, a short-term training course can help create the right learning atmosphere and speed up progress. If you also want to improve your English, you can try a targeted MOOC co

1 min
[Answer] Can high school humanities graduates choose engineering majors? For example, fields like artificial intelligence or automation?
Zhihu Q&AMarch 22, 2026

[Answer] Can high school humanities graduates choose engineering majors? For example, fields like artificial intelligence or automation?

In general, students from the humanities track usually cannot apply directly to engineering majors, since they belong to two different broad academic paths. However, as a personal interest, being in t

1 min
[Answer] A female high school senior about to graduate wants to choose a good major—Should I study medicine? I’d really like advice from older students.
Zhihu Q&AMarch 22, 2026

[Answer] A female high school senior about to graduate wants to choose a good major—Should I study medicine? I’d really like advice from older students.

If you have doctors among your relatives or family friends, it’s best to sit down and talk with them in detail about what medical students study, what daily work is like after graduation, and what kin

1 min
[Answer] My boss suddenly asked me to learn and apply it on the spot. How should I start learning the Siemens PLC S7-200? I’m very confused.
Zhihu Q&AMarch 22, 2026

[Answer] My boss suddenly asked me to learn and apply it on the spot. How should I start learning the Siemens PLC S7-200? I’m very confused.

If you follow Teacher Liao Changchu’s book step by step, you’ll learn the S7-200.

1 min
[Answer] What Is Object-Oriented Programming? Why Be “Oriented” Toward It?
Zhihu Q&AMarch 22, 2026

[Answer] What Is Object-Oriented Programming? Why Be “Oriented” Toward It?

This is mainly a matter of translation: in “Object-Oriented Programming,” “Object” is generally translated as “object,” and “Oriented” as “oriented toward,” so the full phrase becomes object-oriented

1 min
[Answer] Is It Necessary for Non-Computer Majors to Learn Programming?
Zhihu Q&AMarch 22, 2026

[Answer] Is It Necessary for Non-Computer Majors to Learn Programming?

If they have the time and energy, students of any major should learn some programming. Computers have become a major productive force and tool in modern society, and programming can directly improve w

2 min
Career Paths for Non-Standard Automation Equipment Technicians
Zhihu Q&AMarch 22, 2026

Career Paths for Non-Standard Automation Equipment Technicians

[回答] 非标自动化设备维修员职业发展方向有哪些? PLC是第一阶段进阶应该掌握的;同时还 ️常用的SCADA软件。 第二阶段可以考虑了解单片机和高级语言。当然可能大部分工程师到前一个阶段就可以糊口了

1 min
1234567
Next
JJohn's Blog

Notes on technology, life, and ideas.

Navigation

  • Home
  • Articles
  • Subscribe

Contact

  • GitHub
  • Email
© 2026 John Wei. All rights reserved.