Translate Doc Zh

• If the Chinese file already exists, update only the changed parts while preserving the rest.
• If the Chinese file does not exist, translate the full document.

Translation Rules

• Preserve technical terms such as FSDP, FSDP2, GRPO, PPO, DAPO, MoE, LLM, RL, RLVR, Codex, Claude Code, OpenCode, Megatron, Archon, SGLang, vLLM, PyTorch, HuggingFace, and Transformers.
• Do not translate file paths, code blocks, CLI flags, or literal configuration keys.
• Preserve Markdown structure, tables, and fenced code blocks.
• Use concise, professional Chinese terminology.

Error Handling

• If the target directory does not exist, create it before writing the translated file.
• If the source document is partially translated already, preserve sections that do not need updates.