1. Background of the Construction of 58 Portraits Platform First of all, I would like to share with you the background of the construction of the 58 Portrait Platform. 1. The traditional thinking of the traditional profiling platform is no longer enough. Building a user profiling platform relies on data warehouse modeling capabilities to integrate data from multiple business lines to build accurate user portraits; it also requires data mining to understand user behavior, interests and needs, and provide algorithms. side capabilities; finally, it also needs to have data platform capabilities to efficiently store, query and share user profile data and provide profile services. The main difference between a self-built business profiling platform and a middle-office profiling platform is that the self-built profiling platform serves a single business line and can be customized on demand; the mid-office platform serves multiple business lines, has complex modeling, and provides more general capabilities. 2.58 User portraits of the background of Zhongtai portrait construction

H5 is more flexible and customizable, but requires skilled technology; mini programs are quick to get started and easy to maintain, but are limited by the WeChat framework.

Yes, H5 page production is an important implementation method for front-end development, involving core technologies such as HTML, CSS and JavaScript. Developers build dynamic and powerful H5 pages by cleverly combining these technologies, such as using the <canvas> tag to draw graphics or using JavaScript to control interaction behavior.

MySQL can run without network connections for basic data storage and management. However, network connection is required for interaction with other systems, remote access, or using advanced features such as replication and clustering. Additionally, security measures (such as firewalls), performance optimization (choose the right network connection), and data backup are critical to connecting to the Internet.

The choice of H5 and applet depends on the requirements. For applications with cross-platform, rapid development and high scalability, choose H5; for applications with native experience, rich functions and platform dependencies, choose applets.

Bitcoin’s price ranges from $20,000 to $30,000. 1. Bitcoin’s price has fluctuated dramatically since 2009, reaching nearly $20,000 in 2017 and nearly $60,000 in 2021. 2. Prices are affected by factors such as market demand, supply, and macroeconomic environment. 3. Get real-time prices through exchanges, mobile apps and websites. 4. Bitcoin price is highly volatile, driven by market sentiment and external factors. 5. It has a certain relationship with traditional financial markets and is affected by global stock markets, the strength of the US dollar, etc. 6. The long-term trend is bullish, but risks need to be assessed with caution.

The top ten trading apps in the currency circle are: 1. OKX; 2. Binance; 3. Gate.io; 4. Huobi Global; 5. Kraken; 6. Coinbase; 7. KuCoin; 8. Bitfinex; 9. Crypto.com; 10. Gemini. The ranking is based on the comprehensive consideration of the exchange's technical strength, user experience, security, currency selection, compliance and other factors.

Through network requests, resource loading, JavaScript execution and rendering optimization, the performance of H5 pages can be improved and a smooth and efficient page can be created: resource optimization: compressed images (such as using tinypng), simplified code, and enabled browser caching. Network request optimization: merge files, use CDN, and load asynchronously. JavaScript optimization: reduce DOM operations, use requestAnimationFrame, and make good use of virtual DOM. Advanced skills: code segmentation, server-side rendering.