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kj’s blog
Tomorrow is definitely Sunday too, right?
2026-10-292390 words12 mins
How to Fine-Tune a Video Model with a 12GB Graphics Card: A Log of My ZeRO-3 Multi-GPU Experiment
Fine-tuning Video-ORA on the RTX 3060, documenting issues encountered with video input budget, ZeRO-3 weight loading, and multi-card sampling, as well as actual test results for two-card and four-card setups.
2026-09-171944 words10 mins
Receiving Notifications via China Mobile's New Messaging Service: CMCC Notify Development Log
Notify the server to add one more China Mobile message channel, and document the standalone CMCC Notify service, the Gotify plugin, and how images, files, and long messages are actually displayed.
2026-08-201395 words7 mins
iDEAL Withdrawal History for the ChatGPT Discount Checkout
Documenting the iDEAL payment redirection process for the ChatGPT Checkout promotion: Retrieve the local payment method based on the region of the visitor’s IP address, and read the bank redirection link from the Stripe confirmation response.
2026-08-201575 words8 mins
ChatGPT Discount Checkout: Direct Card Linking History
This document outlines the process for linking a debit card directly to ChatGPT Checkout, including pre-linking a card via SetupIntent, synchronizing the "Attach" status, and pre-checkout verification.
2026-05-212286 words11 mins
Share the Large Model with Your Family: Connect Codex to WeChat
A log of the “weixin-household-gateway” WeChat home AI gateway project: why we’re doing it, how we’re managing permissions, how we’re handling WeChat output, and the pitfalls we’ve encountered along the way.
2026-03-141368 words7 mins
Guide to Reinstalling the Raspberry Pi System and Configuring VNC Remote Desktop
A step-by-step guide detailing how to start the VNC service, obtain the IP address, and troubleshoot connection issues via the command line after replacing the TF card on a Raspberry Pi.
2026-02-28550 words3 mins
Meting-API User Guide
A concise guide to using the Meting-API for player integration and routine debugging.
2026-02-17304 words2 mins
Solution for a Blank Screen on the Raspberry Pi 4 When Using VNC
Resolving the issue of a blank screen and the desktop not displaying when configuring VNC during the initial startup of a Raspberry Pi 4.
2026-02-071235 words6 mins
A Detailed Explanation of the Linux Server Directory Structure
A Detailed Explanation of the Linux File System Structure: The Functions and Roles of Directories from the Root Directory to Common System Directories.
2026-02-06734 words4 mins
Server Operations Tips: SSH Tunnels and Docker Network Configuration
SSH reverse tunnels, command-line proxies, and Docker image pull configuration for server maintenance, including cleanup after the task.