Joseph Wei is a venture partner at Skychee Ventures who has mentored and advised startups. He discusses four key reasons why startups come to San Francisco and Silicon Valley: 1) access to venture capital funding, 2) access to talent from top universities, 3) acceptance of startup failures, and 4) opportunities to learn from other tech companies. He notes the region's entrepreneur-friendly culture, diversity, and wealth of technical and business expertise that have made it a global center for technology and innovation.