
One purchase includes all six graded versions.
Sherlock Holmes: The Sign of the Four
福尔摩斯:四签名
A stolen treasure and a broken promise
Arthur Conan Doyle · 1890 · mystery, adventure
A frightened young woman brings Sherlock Holmes a mystery of vanishing pearls and a long-buried theft of Indian treasure. The trail winds through hidden pacts and a desperate pursuit down the Thames toward a deadly secret.
Peek inside — compare all six levels
The opening · where the story begins — the A1 version:
Words you’d collect from this passage:
every chapter is illustrated
Midway through · the plot thickens — the A1 version:
Words you’d collect from this passage:


Near the end · no spoilers — just the language — the A1 version:
Words you’d collect from this passage:


Which level should you read?
Every version tells the full story — A1 uses only the ~1,500 most common words, C1 reads close to the original. Pick the level where you know almost every word: reading should feel like reading, not deciphering.
关于这本书 · About this book
这本书是根据英国作家阿瑟·柯南·道尔的小说《福尔摩斯:四签名》改写的简单中文版。 Insperium Chinese 分级读物有两个目标。第一个,也是最重要的,是学习中文——用适合你水平的语言,让你的阅读一步一步进步,不让你太累。第二个目标是慢慢带你认识中国和世界的经典名著,这样你从 A1 一步一步学到 C1 的时候,也认识了每个有文化的读者都知道的重要故事。 这些书的每一个设计,都是为了让这段旅程尽可能轻松、有趣——读书就应该是读书的感觉,而不是「学习」的感觉。所以每一章都有精美的插画;所以每本书都有两个部分:Part A 在每个汉字上面都标了拼音,在你还在学习的时候陪着你;Part B 只有汉字,等你准备好了,再读一遍。 原版的小说很长。《三国演义》本来有一百多章,《红楼梦》有三十多个主要人物。我们在长度和语言难度上都做了很多简化,所以你现在就能读到这些故事。等你的中文更好的时候,原版的书还在那里等着你。 怎么使用这本书: 这本书有两个版本的故事。第一个版本(Part A)在每个汉字上面都有拼音。第二个版本(Part B)没有拼音——当你准备好了,可以试试不看拼音阅读。 在阅读之前,先看看「人物关系」和「重要词汇」这两页。这本书有插画,帮助你进入故事的世界。读完以后,你可以做后面的阅读理解题来检查你的理解。
This book is a simplified Chinese version of the novel Sherlock Holmes: The Sign of the Four by British author Arthur Conan Doyle. Insperium Chinese graded readers have two goals. The first and most important is language comprehension — Chinese at the right level to grow your reading step by step, without exhausting you. The second is a gradual introduction to the great classics of China and the wider world, so that as you climb from A1 to C1 you also meet the stories every educated reader knows. Everything about these books is built to make that journey as pleasant and entertaining as possible — reading should feel like reading, never like studying. That is why every chapter is fully illustrated, and why each book has two sides: Part A tells the story with pinyin above every character to carry you while you are still learning, and Part B tells it again in characters only, ready for the moment you are. The originals are large — Romance of the Three Kingdoms alone runs more than a hundred chapters, and Dream of the Red Chamber has over thirty principal characters. We have simplified them deeply, in both length and language level, so the story is reachable now. When your Chinese is ready, the originals will still be waiting. How to use this book: This book contains two versions of the story. The first version (Part A) has pinyin above every character. The second version (Part B) has no pinyin — try reading without it when you feel ready. Before you start, check the "Character Map" and "Key Vocabulary" pages. The book is illustrated throughout to help you sink into the world of the story. After reading, try the comprehension questions to check your understanding.
Key characters

fú ěr mó sī
福尔摩斯
Sherlock Holmes
Main characterThe famed detective of Baker Street, restless without a case to occupy his mind, who takes on the mystery of a missing father and a vanished treasure.

huà shēng
华生
Dr. Watson
Main characterHolmes's steady companion and a former army doctor, whose warmth and sympathy draw him toward the young client who arrives seeking their help.

mǎ lì mó sī tǎn
玛丽·摩斯坦
Mary Morstan
Main characterA composed young woman whose father vanished years ago and who has received a mysterious gift every year since; her visit to Baker Street sets the mystery in motion.

shū ěr tuō
舒尔托
Thaddeus Sholto
SupportingA nervous, guilt-ridden young man whose father was entangled in Mary's family history, and who reveals the tangled story of a hidden treasure before tragedy strikes again.

sī mò ěr
斯莫尔
Jonathan Small
SupportingA hardened man with a wooden leg and deep ties to a treasure's history in India, whose long-held resentment drives the story toward its final confrontation.
Key vocabulary
This is what stands between you and reading this book comfortably. You won’t drill all of it — mark the words you already know and they leave the queue for good, so every minute of study goes to the words that actually block your reading.
| 中文 | Pinyin | English | HSK | Your list |
|---|---|---|---|---|
| 幢 | zhuàng | Building (meaure word) | 6 | |
| 口气 | kǒuqì | tone | 6 | |
| 温和 | wēnhé | mild | 6 | |
| 巷 | xiàng | Alley | 6 | |
| 铺 | pū | spread | 6 | |
| 膝盖 | xīgài | knee | 6 | |
| 角落 | jiǎoluò | corner | 6 | |
| 是非 | shìfēi | right and wrong; quarrel; dispute | 6 | |
| 拼命 | pīnmìng | Try my best | 6 | |
| 眼神 | yǎnshén | expression in one’s eyes | 6 |
Try the course — this is the actual drill
The course has one goal: get you reading this book at this level as fast as possible. Every word is learned in real context — sentences straight from the story, not word lists — and a proven spaced-repetition system brings each one back right before you’d forget it. Your time goes only to the words you don’t know yet. Here are the book’s first five — flip, grade yourself, and feel how it works.
New items
Session stats
5 cards remaining
← Forgot | Space flip | → Remember
Lesson progress
LEARNED 0/5
Details
Word帮助
bāngzhù
help
appears 4× · first ~9% into the story
Round 1 of 4
Word examples
他真的很想帮助她
tā zhēn de hěn xiǎng bāng zhù tā
He truly wanted to help her.
没有你的帮助,我可能不会认识她
méi yǒu nǐ de bāng zhù wǒ kě néng bú huì rèn shi tā
"Without your help, I might never have met her."
伦敦这么大,总会有人需要你的帮助
lún dūn zhè me dà zǒng huì yǒu rén xū yào nǐ de bāng zhù
London is so big -- someone will need your help eventually.
Flip through the book
This is a real sample of the book edition — cover, characters, key vocabulary and the opening pages with pinyin. Turn the pages and see exactly what you’re getting.
Interactive edition — available now
The Insperium edition is the one that teaches you: pinyin and karaoke audio, every word tappable, the full vocabulary course, and all six levels in one purchase.
Get the interactive editionWhat’s inside the book edition
- Part A — the full story with pinyin above every character
- Part B — the same story in characters only, for when you’re ready
- Original illustrations in every chapter
- Key vocabulary up front + the complete word list at the back
- Sentence patterns & grammar notes with try-it-yourself lines
- Comprehension questions to check your understanding
Paperback & e-book editions
Prefer paper or your e-reader? Print and store editions are on the way.
Read it freely
Every level comes with pinyin and karaoke audio that highlights as you read — so you can follow along even when the grammar is new.
Master the level, not just the book
The book’s vocabulary is a full spaced-repetition course. It drills only the words you don’t know yet, in sentences from the story, and reviews each one right before you’d forget — the fastest route to reading this level comfortably, here and in every book after it.
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