小程的树洞

Xiaocheng's tree hole

This is my personal space, recording radio, first aid knowledge, programming, and life thinking. Welcome to come and sit down.

my passion

Amateur radio enthusiast (BA4IGI), Red Cross rescuer, Swift developer, explore the world in code and radio waves.

Sharing and Growth

By using words to reflect and technology to solve problems, I hope the content here can provide you with some inspiration.

Recent Posts

Detailed Explanation of the Allocation Rules for Amateur Radio Call Signs in China

1 months ago BA4IGI

1、 General format of call sign in Chinese Mainland Unified format of call sign for domestic legitimate amateur radio stations: B+letter of station type+division number+call sign suffix II, [...]

Red Cross Ambulance Worker Science Popularization: On site First Aid Knowledge that Ordinary People Must Learn

1 months ago BA4IGI

As a certified Red Cross rescuer, I would like to share with everyone the most practical and easy to learn first aid knowledge through this article. These skills do not require specialized equipment, [...]