Hong Kong E-commerce App Development

I need an e-commerce app tailored for Hong Kong that can scale to China. The app must prioritize payment processing.

Key Requirements:
- User-friendly interface for seamless navigation
- Robust and secure payment processing system
- Scalable architecture to accommodate expansion into China
- Compliance with local regulations for both markets
- Multi-language support, including Cantonese and Mandarin

Ideal Skills and Experience:
- Proven experience in developing e-commerce applications
- Strong background in payment processing integrations
- Knowledge of Hong Kong and Chinese market regulations
- Fluent in Cantonese and Mandarin is a plus
- Excellent UI/UX design skills

Please provide examples of similar projects you've completed.