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Chasing 100M Daily Users, Duolingo Reconsiders Ads, Paying Influencers, and Its Most Expensive Plan

AI got cheap enough that Duolingo’s most expensive plan may not survive it. I read the earnings call transcript and opened the app to see what is actually changing for learners.

Dhawal Shah Sep 03, 2026

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Future Automobiles

An overview of future automobiles and their emerging technologies.
- XuetangX
- Self-Paced
- Free Online Course
Fine Traditional Chinese Culture

An introduction to traditional Chinese culture.
- XuetangX
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- Free Online Course
“Winter Olympics” and Winter Sports

Explore how Beijing 2022 shaped China’s winter sports culture, venues, technology, sustainability, and industry.
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- Self-Paced
- Free Online Course
National Parks and Protected Areas of China

Explore China’s national parks and protected areas through the lens of conservation and natural-resource management.
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- Free Online Course
National Parks and Protected Areas of China

Explore China’s national parks and protected-area system, including nature reserves, world heritage sites, and conservation across diverse landscapes.
- XuetangX
- Self-Paced
- Free Online Course
Future Automobiles

Through theoretical lectures and interactive seminars, this course systematically introduces new energy, intelligent network connectivity, autopilot, intelligent transportation, automobile safety, automobile design, and automotive industry and carbon neu…
- XuetangX
- Self-Paced
- Free Online Course
Tsinghua Global Summer School 2021

Innovation for Sustainable Development Tsinghua Global Summer School 2021
- XuetangX
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Fine Traditional Chinese Culture

Explore Chinese culture through history, rhetoric, Sino-Tibetan Buddhism, Lu Xun, and encounters between Chinese and Western traditions.
- XuetangX
- Self-Paced
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China's Approach to Poverty Eradication

Examines China’s path to poverty eradication through economic reform, public policy, governance, cultural practices, media, and welfare systems.
- XuetangX
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SDG Dialogue: Digital Transformation for a More Inclusive University Campus and Learning Environment

Explore how digital transformation, Universal Design for Learning, and assistive technology can make university campuses and online learning more inclusive.
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‘Pathway to Net-Zero’ Climate Talk series No.1-“China’s Long-term Low-carbon Development Strategy and Pathway”

Professor HE is the Deputy Chair of China's National Expert Committee on Climate Change, Director of the Academic Committee of the Institute of Climate Change and Sustainable Development (ICCSD)of Tsinghua University, as well as GAUC’s Co-Chair of Academ…
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Climate X (Global Youth Summit on Net-Zero Future)

A global youth summit connects academic, action, and youth voice tracks to explore pathways toward a net-zero future.
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The World Philanthropy Forum 2020 Special Symposium

This special symposium sets up 3 thematic sessions: Global Economic Integration, Global Philanthropy Connection and Leadership, and Life in Community
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5TH WORLD PHILANTHROPY FORUM

A global forum focused on philanthropy and charitable giving.
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Finite Element Method (FEM) Analysis and Applications

The main content of this course includes: fundamental mathematics and mechanics method, basic properties of the finite element method
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