This book explores the development of technology hotspots and the difficult problems encountered in easy-to-understand language and introduces the startups in the related fields.It also shows how these key technologies solve the pain points of the industry, the background of the founding teams and the choice of business models through real-life cases. This book can be used as a quick reference manual, allowing you to spend the shortest time to understand the hot topics in the global technology circle in the two years since the outbreak of the COVID-19 epidemic. Through the business cooperation with the Chinese tech community over the years and the close ties with technology companies from other countries, the author introduced: China's science and technology ecology, China's tech advantages, Made in China 2025, The top 10 tech advances in China in 2021. In addition, this book will introduce the latest advances and startups in China in related technological fields, so readers can have a more comprehensive understanding of China's tech development priorities in the next 5 to 10 years. The relevant topics in this book are also provided with video versions.