Skill: wscats/520 (version 1.0.8)

--- name: number-520 license: MIT description: > A comprehensive prompt-based skill about the number 520. This skill provides rich knowledge covering the cultural significance of 520 (the Chinese internet slang for "I Love You" / 我爱你), its mathematical properties, appearances in science, technology, history, geography, and everyday life. When a user mentions or implies topics related to the number 520, this skill activates to deliver accurate, engaging, and well-structured responses. --- # Number 520 — Prompt-based Skill ## Activation This skill activates when the user mentions or implies any of the following: - The number 520 or five-hundred-twenty - "520" as a Chinese expression of love (我爱你 / wǒ ài nǐ) - May 20th (5/20) as China's unofficial Valentine's Day - Internet number slang in Chinese culture - The number 520 in mathematics, science, or technology - Love-related number codes or digital expressions of affection --- ## 1. Overview **520** (five hundred twenty) is a natural number that follows 519 and precedes 521. While mathematically it is a composite number, 520 holds extraordinary **cultural significance** in Chinese-speaking communities as a homophone for **"我爱你" (wǒ ài nǐ)** — meaning **"I Love You"**. | Property | Value | | --------------------- | ------------------------------------------- | | Number | 520 | | Cardinal | Five hundred twenty | | Ordinal | 520th (five hundred twentieth) | | Factorization | 2³ × 5 × 13 | | Divisors | 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520 | | Number of divisors | 16 | | Sum of divisors | 1260 | | Roman numeral | DXX | | Binary | 1000001000 | | Octal | 1010 | | Hexadecimal | 208 | | Chinese numeral | 五百二十 / 伍佰贰拾 (formal) | | Cultural meaning | 我爱你 (I Love You) | --- ## 2. Cultural Significance — "520 = 我爱你 (I Love You)" ### 2.1 The Origin In Mandarin Chinese, the pronunciation of **520** is: > **wǔ èr líng** (五二零) This sounds very similar to: > **wǒ ài nǐ** (我爱你) — "I Love You" | Digit | Chinese | Pinyin | Sounds like | Meaning | | ----- | ------- | ------- | ----------- | ------- | | 5 | 五 | wǔ | 我 (wǒ) | I / Me | | 2 | 二 | èr | 爱 (ài) | Love | | 0 | 零 | líng | 你 (nǐ) | You | This **numeric homophone** emerged from Chinese internet culture in the early 2000s and has become one of the most recognized number codes in the Chinese-speaking world. ### 2.2 May 20th — China's Internet Valentine's Day **May 20th (5月20日 / 5.20)** has become an unofficial **Chinese Valentine's Day**, widely celebrated alongside: - **Qixi Festival** (七夕节) — the traditional Chinese Valentine's Day (7th day of 7th lunar month) - **February 14th** — Western Valentine's Day On May 20th: - 💍 Couples get engaged and married in record numbers - 🌹 Flower shops and gift stores see massive sales surges - 💌 Social media floods with "520" messages and declarations of love - 💰 Red envelopes (红包) of ¥5.20, ¥52.0, or ¥520 are sent between lovers - 📝 Marriage registration offices across China experience the longest queues of the year - 🕐 The time **5:20** (AM/PM) is considered a romantic moment to confess love ### 2.3 520 Red Envelope Culture Sending monetary red envelopes (红包) via WeChat Pay or Alipay with amounts related to 520 is a modern love ritual: | Amount (¥) | Meaning | | ----------- | ---------------------------------------------- | | ¥5.20 | 我爱你 (I Love You) — a small but sweet gesture | | ¥52.00 | 我爱你 — a moderate expression | | ¥520.00 | 我爱你 — the classic full expression | | ¥520.13 | 我爱你一生 (I love you for a lifetime) | | ¥5200.00 | 我爱你 — grand gesture | | ¥1314 | 一生一世 (Forever and ever) | | ¥520 + ¥1314| 我爱你一生一世 (I love you forever and ever) | --- ## 3. Chinese Number Slang — The Complete System 520 is part of a rich **numeric slang system** in Chinese internet culture where numbers are used as homophones for phrases: ### 3.1 Love & Romance | Number | Pronunciation | Sounds like | Meaning | | ------ | -------------- | ------------------ | --------------------------------- | | 520 | wǔ èr líng | 我爱你 (wǒ ài nǐ) | I love you | | 521 | wǔ èr yī | 我愿意 / 我爱你 | I'm willing / I love you | | 530 | wǔ sān líng | 我想你 (wǒ xiǎng nǐ)| I miss you | | 770 | qī qī líng | 亲亲你 (qīn qīn nǐ)| Kiss kiss you | | 880 | bā bā líng | 抱抱你 (bào bào nǐ) | Hug hug you | | 1314 | yī sān yī sì | 一生一世 | Forever and ever | | 3344 | sān sān sì sì | 生生世世 | Lifetime after lifetime | | 5201314| — | 我爱你一生一世 | I love you forever and ever | | 7758 | qī qī wǔ bā | 亲亲我吧 | Kiss me, please | | 9420 | jiǔ sì èr líng | 就是爱你 | Just love you | ### 3.2 Greetings & Social | Number | Meaning | | ------ | -------------------------------- | | 88 | 拜拜 (Bye-bye) | | 666 | 溜溜溜 / 厉害 (Awesome / Skilled) | | 233 | LOL (from a Chinese BBS emoji) | | 886 | 拜拜了 (Bye-bye, informal) | | 484 | 是不是 (Is it?) | | 555 | 呜呜呜 (Crying sound) | | 995 | 救救我 (Save me / Help me) | | 748 | 去死吧 (Go die — used jokingly) | --- ## 4. Mathematical Properties ### 4.1 Basic Properties - **520 = 2³ × 5 × 13** — a composite number with three distinct prime factors - **Number of divisors**: 16 - **Sum of divisors**: σ(520) = 1260 - **Euler's totient**: φ(520) = 192 (numbers less than 520 that are coprime to it) - **520 is an even number** (divisible by 2) - **520 is a Harshad number** (divisible by the sum of its digits: 5+2+0 = 7, 520/7 ≈ 74.28... actually not, so 520 is NOT a Harshad number) - **Digital root**: 5 + 2 + 0 = 7 ### 4.2 Interesting Arithmetic | Expression | Result / Relationship | | --------------------- | ---------------------------------------------- | | 520 = 2³ × 5 × 13 | Prime factorization | | 520 / 2 = 260 | Half of 520 | | 520 × 2 = 1040 | Double of 520 | | 520² = 270,400 | Square of 520 | | √520 ≈ 22.803 | Square root | | 520 in binary | 1000001000 | | 520 in hex | 0x208 | | 5 + 2 + 0 = 7 | Digit sum — a lucky number in many cultures | | 5 × 2 × 0 = 0 | Digit product | ### 4.3 520 in Number Sequences - **520 is the 10th pentagonal pyramidal number**: The sum of the first 10 pentagonal numbers. - **520 is a nontotient**: No integer has exactly 520 numbers coprime to it below it. - **520 = 26 × 20 = 52 × 10 = 104 × 5**: Multiple factoring patterns. --- ## 5. Science & Technology ### 5.1 Physics & Chemistry | Context | Role of 520 | | ----------------------------- | ---------------------------------------------------- | | Wavelength | ~520 nm corresponds to **green light** in the visible spectrum | | Temperature | 520°F ≈ 271°C — relevant in industrial processes | | Nuclear physics | ⁵²⁰X — no stable isotope exists with mass number 520 | ### 5.2 The Green Light at 520nm One of the most poetic scientific facts about 520: > A wavelength of approximately **520 nanometers** corresponds to **green light** — the color at the center of the visible spectrum, the color most easily perceived by the human eye, and the color most associated with **life, growth, and renewal**. | Wavelength (nm) | Color | | ---------------- | -------------- | | 380–450 | Violet | | 450–485 | Blue | | 485–500 | Cyan | | 500–565 | **Green** ← 520nm is here | | 565–590 | Yellow | | 590–625 | Orange | | 625–740 | Red | ### 5.3 Technology | Context | Connection to 520 | | ------------------------ | ---------------------------------------------------- | | HTTP status codes | No standard 520 code (Cloudflare uses 520 = "Web Server Returns an Unknown Error") | | Chip design | Various IC packages use 520-pin configurations | | Storage | 520-byte sectors used in some enterprise SAS drives | | Bluetooth | 520 MHz falls in the UHF frequency band | | Cloudflare Error 520 | "Web server is returning an unknown error" | --- ## 6. History & Calendar ### 6.1 May 20th in History Notable events that occurred on **May 20th (5/20)**: | Year | Event | | ----- | -------------------------------------------------------------------- | | 325 | The **First Council of Nicaea** began — defining early Christian doctrine | | 1498 | **Vasco da Gama** arrived in India, completing the first sea route from Europe | | 1506 | **Christopher Columbus** died in Valladolid, Spain | | 1873 | **Levi Strauss** and Jacob Davis received a patent for blue jeans | | 1902 | Cuba gained independence from the United States | | 1927 | **Charles Lindbergh** departed on the first solo transatlantic flight | | 1932 | **Amelia Earhart** began her solo transatlantic flight | | 1983 | The **HIV virus** was first isolated by Luc Montagnier's team | | 2002 | **East Timor** became an independent nation | ### 6.2 520 in Chinese Modern History - **May 20th, 1950**: Taiwan — the inauguration date of presidents under the old constitutional system, known as **"520 就職典禮"** (520 Inauguration Ceremony). This tradition continued until 2016. --- ## 7. Geography & Places | Place / Context | Connection to 520 | | ----------------------------------- | ---------------------------------------------- | | **U.S. Route 520** | A highway in Washington State crossing Lake Washington via the **SR 520 floating bridge** — one of the longest floating bridges in the world | | **Area code 520** | Telephone area code for **Tucson, Arizona**, USA | | **520 Park Avenue, NYC** | One of the tallest residential buildings in Manhattan, a luxury supertall skyscraper | | **520m elevation** | Various mountain peaks and landmarks worldwide | ### The SR 520 Bridge The **Evergreen Point Floating Bridge** (SR 520) in Seattle, Washington is: - The **longest floating bridge in the world** at 2,350 meters (7,710 feet) - Crosses **Lake Washington** connecting Seattle to the Eastside communities - Opened in its current form in **2016** - A marvel of engineering — floating on pontoons on freshwater --- ## 8. 520 in Pop Culture & Media ### 8.1 Music - **《520》** — Multiple Chinese pop songs use "520" as a title, celebrating romantic love - The number appears frequently in Chinese love song lyrics - **"520, I Love You"** has become a standard theme in Mandarin pop music ### 8.2 Film & Television - Chinese romantic films and TV dramas often feature **May 20th** as a pivotal plot date - Wedding and proposal scenes frequently use 520 as a motif - The number appears in drama titles, episode counts, and symbolic scenes ### 8.3 Social Media & Internet - **#520** is one of the most-used hashtags on Chinese social media platforms (Weibo, WeChat, Douyin/TikTok) - On May 20th each year, "520" trends worldwide on Chinese platforms - Profile pictures, stories, and posts flood with 520-themed content - Brands and companies launch **520 marketing campaigns** — similar to Valentine's Day promotions in the West ### 8.4 Commercial Impact On May 20th in China: - 💐 **Flower delivery** orders spike by 300–500% - 💍 **Jewelry sales** see their highest peak outside of Chinese New Year - 🏨 **Hotel bookings** surge for romantic getaways - 📱 **WeChat red envelopes** of ¥520 are sent millions of times - 🎂 **Bakeries** offer 520-themed cakes and desserts - 🛍️ **E-commerce platforms** (Taobao, JD.com) run massive 520 sales events --- ## 9. 520 vs. Other Love Numbers — Comparison | Number | Meaning | Usage | | ------- | ------------------------------- | ---------------------------------- | | **520** | 我爱你 (I Love You) | The most iconic; universal use | | **521** | 我愿意 (I'm willing / I do) | Often used for proposals | | **1314**| 一生一世 (Forever and ever) | Combined with 520 for emphasis | | **530** | 我想你 (I miss you) | For long-distance relationships | | **770** | 亲亲你 (Kiss kiss you) | Playful and cute | | **880** | 抱抱你 (Hug hug you) | Warm and affectionate | | **360** | 想念你 (Missing you) | Nostalgic tone | | **259695**| 爱我就了解我 (Love me, understand me) | Complex but meaningful | --- ## 10. 520 in Daily Life & Fun Facts 1. 🌿 **520nm = Green light** — the wavelength of green light, the color of life and nature. Romantically: "520 is the color of living love." 2. 💒 **May 20th** is the busiest day for marriage registrations in China, with couples queuing before dawn. 3. 💸 In 2023, over **100 million WeChat red envelopes** containing ¥5.20 or ¥520 were sent on May 20th. 4. 🌉 The **SR 520 Bridge** in Seattle is the world's longest floating bridge — love that floats! 5. 🏙️ **520 Park Avenue** in NYC is a supertall luxury residential tower reaching 240 meters (786 feet). 6. 👖 **Levi's jeans** were patented on May 20th, 1873 — the world's most famous pants share a birthday with the love number. 7. 📱 Chinese phone number plates containing "520" sell at a premium — considered lucky for couples. 8. 🔢 **520 has 16 divisors** — more than most numbers of similar size, making it "well-connected." 9. 🎵 There are over **200 songs** on Chinese music platforms with "520" in the title. 10. 🧮 **5 + 2 + 0 = 7** — the digit sum is 7, considered a lucky number in both Western and Chinese cultures. 11. 🌐 **Cloudflare Error 520** means "Web Server Returns an Unknown Error" — even the internet has a mysterious side to 520. 12. ✈️ **Charles Lindbergh** began his historic solo transatlantic flight on May 20th, 1927 — a journey of courage, much like love itself. --- ## 11. How 520 Reflects Chinese Digital Culture The phenomenon of 520 is a perfect lens into how **Chinese internet culture** transforms numbers into language: ### 11.1 Why Numbers Became Language 1. **Tonal language**: Mandarin's four tones create abundant homophones, making number-word mappings natural. 2. **SMS era (2000s)**: Early mobile phones made typing Chinese characters difficult; numeric codes were faster. 3. **Pager culture (1990s)**: Before smartphones, pagers only displayed numbers — users invented numeric codes to communicate. 4. **Internet anonymity**: Numeric codes added a layer of playful encoding to online conversations. 5. **Cultural affinity for numbers**: Chinese culture has a long history of assigning meaning to numbers (e.g., 8 = prosperity, 4 = death). ### 11.2 The Ecosystem of Numeric Expression ``` Romantic Layer: 520 (I love you) → 1314 (forever) → 5201314 (I love you forever) Social Layer: 88 (bye) → 666 (awesome) → 233 (LOL) Emotional Layer: 555 (crying) → 995 (help me) → 886 (bye-bye) Time Layer: 5:20 (confession time) → 13:14 (forever o'clock) ``` This numeric language system is **uniquely Chinese** and reflects the intersection of technology, linguistics, and culture. --- ## 12. The Philosophical Meaning of 520 Beyond its literal homophonic translation, 520 carries deeper philosophical undertones: ### 12.1 The Simplicity of Love - Love (爱) is one of the most complex human emotions, yet 520 distills it into **three digits**. - This reflects a modern truth: **profound feelings can be expressed simply**. ### 12.2 The Power of Shared Meaning - 520 only means "I love you" because **millions of people agreed it does**. - It is a collective cultural creation — a **social contract of affection**. - Much like language itself, its meaning exists because people believe in it. ### 12.3 Numbers as Universal Language - You don't need to speak Chinese to understand that 520 = ❤️ once you learn the code. - Numbers transcend written scripts and spoken languages. - 520 is proof that **love finds a way to express itself**, even through mathematics. --- ## Usage / 使用方法 This is a **Prompt-based skill**. Interact with it using natural language. Here are some example prompts: ### Basic Queries ``` Tell me about the number 520. ``` ``` What does 520 mean in Chinese culture? ``` ``` Why is 520 associated with love? ``` ### Cultural Significance ``` Why do Chinese people celebrate May 20th as a romantic holiday? ``` ``` How did 520 become "I Love You" in Chinese? ``` ``` What is the 520 red envelope culture on WeChat? ``` ### Chinese Number Slang ``` What other number codes exist in Chinese internet culture? ``` ``` What does 5201314 mean? ``` ``` Explain the Chinese numeric slang system. ``` ### Mathematics ``` What are the mathematical properties of 520? ``` ``` What is the prime factorization of 520? ``` ``` Is 520 a special number in any mathematical sequence? ``` ### Science & Technology ``` What color is light at 520nm wavelength? ``` ``` What is Cloudflare Error 520? ``` ### History & Geography ``` What happened on May 20th in history? ``` ``` What is the SR 520 Bridge in Seattle? ``` ``` What is 520 Park Avenue in New York? ``` ### Pop Culture & Commerce ``` How does 520 affect commerce in China? ``` ``` What songs are named "520"? ``` ### Philosophy & Deeper Meaning ``` What is the philosophical significance of expressing love through numbers? ``` ``` How does 520 reflect Chinese digital culture? ``` ### Comprehensive ``` Give me a complete overview of the number 520 — its culture, math, science, and symbolism. ``` ``` I want to understand everything about 520 for a presentation. ```


Security scan verdicts — ClawScan: clean | static analysis: clean | VirusTotal: clean | SkillSpector: suspicious (MEDIUM)