Hanwang Mall
A shopping app with a twist
A dedicated shopping platform for a specific audience: curated products, fast checkout and secure payment — a shopping experience unlike the usual.
DownloadHanwang Tech Open for new projects
Full-Stack Engineering Team
10 Years of Delivery Experience
Android apps, websites, WeChat Mini Programs, Python crawlers and full-site development
Plus dev environment setup and local LLM deployment — one team, end to end.
My App Store
Our Apps
Download an Android app with one tap, or scan the QR code to open a WeChat Mini Program instantly. For questions or custom development, reach us through the contact section below.
Guozhongbao
Everyday convenience services for everyone
A public convenience app that bundles many everyday functions into one place. Simple to use, one-stop, and built around real daily needs.
DownloadXiaojuzi Quote
Multi-industry quote and decision advisor
Describe your requirement in natural language — text, image, video or document — and get a professional quote report: budget range, workload estimate, recommended approach, risk warnings and next actions. Covers eight industries: software, design, renovation, advertising, consulting, training, photography and marketing.
Scan with WeChat
No install needed — just scan
Hanwang AI Studio
Online creation platform powered by Google's latest AI
An online image and video workspace built on Google's newest generative models: text-to-image, image editing and AI video generation (Gemini / Imagen / Veo). Accurate prompt understanding, high-resolution output and a wide range of styles — with no platform watermark, ready to save and use commercially.
Open nowRandom Food
For the chronically undecided
One tap decides what to eat today and ends choice paralysis for good. Add friends and see what everyone else is eating in real time. Tap the red area in the top-right corner repeatedly to unlock a hidden mode.
DownloadServices
What we can build for you
Ten years of full-stack experience across mobile, web, data collection and AI deployment
Android App Development
Native Android development with Java/Kotlin, covering UI design, API integration, performance optimization and store release.
Front-End Websites
Modern responsive websites with React/Vue/Next.js, polished UI/UX design and smooth interaction.
WeChat Mini Programs
End-to-end Mini Program development with native/uni-app/Taro, plus payment, map and cloud development integration.
Python Web Crawlers
Data collection from any website using Selenium/Scrapy/Requests, anti-bot bypass, data cleaning and storage.
Full-Site Development
Front-end and back-end in one: Python/Django/Flask plus a front-end framework, database design and server deployment.
Dev Environment Setup
Environment setup, IDE configuration, Docker containerization, CI/CD pipelines and version management.
Local LLM Deployment
Ollama/llama.cpp/vLLM local deployment, model quantization, API service wrapping and knowledge base setup.
Data Analysis & Visualization
Data processing and analysis, matplotlib/ECharts visualization, machine learning modeling and automated reporting.
Portfolio
Selected Projects
17 real projects across web full-stack, data collection, machine learning and ops tooling
Web Full-Stack
4 projectsOnline Bookstore
Django full-stack e-commerce site: registration and login, product browsing and search, cart and order management, with a responsive Bootstrap front end.
JD Review Collection Platform
A Flask-based review collection tool: configure crawl parameters in a web UI, auto-parse JSON and export CSV.
Real Estate Data Visualization
Flask plus map visualization, crawling listings from five major platforms and comparing them visually.
Online Course System
A Flask full-stack web app with user management, course catalog, SQL database interaction and responsive templates.
Crawling & Data Collection
5 projectsMulti-Platform Data Collection
Selenium automation collecting Olympic medal data (2004-2022) and product data from JD/Taobao/Bilibili, with multiple export formats.
Douyin Comment Crawler
Breaks Douyin's anti-bot layer by constructing full request parameters (a_bogus / verifyFp), with automatic encoding detection and JSON parsing.
Academic Paper Batch Downloader
Bulk download of Wanfang database papers as PDF, with resumable transfers, automatic retries and regex parameter extraction.
Amap POI Data Collection
Uses the Amap Place API to batch-search business listings (name/address/phone) and store them page by page into Excel.
Amazon Product Crawler
Selenium plus WebDriverWait for Amazon product search and extraction, with dynamic waits and anti-bot handling.
Data Analysis & Machine Learning
4 projectsRent Prediction Model
sklearn linear regression for rent pricing, with preprocessing (unit-type encoding), correlation analysis and MSE/R² evaluation across 7 lab reports.
Epidemic SIRD Model
Differential equations simulate epidemic spread, comparing scenarios with and without intervention and visualizing infection/recovery/death curves.
E-Commerce Data Analysis System
Imports Excel into MySQL, analyzes product share across dimensions, visualizes with matplotlib pie charts and automates the collection pipeline.
JD Review Word Cloud
JD review collection plus jieba Chinese word segmentation and wordcloud generation — a full text-processing pipeline.
Tooling & Operations
4 projectsRemote Server Monitoring
SSH remote management, real-time CPU/memory/process monitoring, FTP transfers and MySQL storage of server metrics.
Student Information System
A complete CRUD system with 10+ analysis dimensions and automatic alerts (failed courses / fail rate / unqualified rate).
Batch File Processor
Extracts dates from file contents to rename files automatically, with conflict handling and resume support.
Video Download & Test Automation
Video file downloads, API testing and DrissionPage/Selenium browser automation.
FAQ
Frequently Asked Questions
Scope, experience, contact details and how pricing works
What development services do you provide?
Eight service lines: Android app development (Java/Kotlin), front-end websites (React/Vue/Next.js), WeChat Mini Programs (native/uni-app/Taro), Python web crawlers (Selenium/Scrapy/Requests with anti-bot bypass), full-site development (Django/Flask plus front-end, database and deployment), development environment setup (Docker/CI-CD/Linux), local LLM deployment (Ollama/llama.cpp/vLLM/RAG) and data analysis with visualization (Pandas/Matplotlib/ECharts/sklearn).
How much experience does the team have?
Ten years of project experience with 17 public case studies across web full-stack, crawling and data collection, data analysis and machine learning, and tooling and operations — including an online bookstore, a multi-platform data collection system, a Douyin comment crawler, a rent prediction model and a remote server monitoring system.
How can I contact you, and how fast do you reply?
Three options: ① Phone +86 131 3956 8869; ② Email xiedaning85@gmail.com (preferred for overseas inquiries, Chinese and English supported); ③ WhatsApp — contact David at +86 131 3956 8869 (same number). The team is based in Guangzhou, China; service hours are 9:00–21:00 Beijing Time (GMT+8), and we normally reply within 2 hours on business days.
Can you develop WeChat Mini Programs? What is supported?
Yes. We work with native, uni-app and Taro, and can integrate WeChat Pay, maps and cloud development. We have already shipped the "Xiaojuzi Quote" Mini Program, which turns a natural-language brief (text, image, video or document) into a budget range, workload estimate and risk warnings across eight industries.
How is a project priced?
Pricing depends on complexity and workload. You can describe your requirement in natural language to our "Xiaojuzi Quote" WeChat Mini Program and receive a quote report with budget range, workload estimate, recommended approach, risk warnings and next actions — or simply call us for a tailored proposal.
Do you handle LLM and AI projects?
Yes. We deploy Ollama, llama.cpp and vLLM locally, handle model quantization, wrap models behind an API and build RAG knowledge bases. We also build AI image and video applications — Hanwang AI Studio is already connected to Google Gemini / Imagen / Veo and exports without watermarks.
Contact
Get in Touch
Reach out any time — we will get back to you promptly
Serving clients worldwide · English & Chinese support
Phone
+86 131 3956 8869
Beijing time 9:00–21:00 (GMT+8)
xiedaning85@gmail.com
Preferred for overseas inquiries
WeChat (same number)
Long-press to scan, and note "software inquiry" when adding
David · +86 131 3956 8869
Response time: within 2 hours on business days · Service hours: 9:00–21:00 Beijing Time (GMT+8) · Chinese and English supported
Start your project
Tell us what you need and we will come back with a technical plan and a quote. From a small crawler script to a complete product build, we can handle it.