You are completely focused on the wrong detail, which is the PPT background. The company isn't hiring a graphic designer, they are testing how you think. Comparing your idea to WeChat is a huge mistake because it shows a misunderstanding of scale. They gave you one week to develop a concept, not a plan to build a super-app that took a decade and billions of dollars. Your task is to show structured thinking and a creative, but realistic, spark. They want to see if you can identify a problem for a specific group of people and propose a simple, clear solution.
Use what you know. You are a student in Hong Kong with content creation skills, so build your idea around that. Think smaller, like a community for students to find specific types of local internships, or a group for a niche hobby you have. Your content skills are your superpower here, so make that the core of the execution plan. Explain how you would use content to attract and engage the first 100 users. A simple, focused plan for a small, passionate community will impress them far more than a vague plan to build the next giant platform.
Presenting a big idea like this is tough, and it’s why my team built an AI interview helper, so candidates can articulate their thoughts clearly even when the pressure is on.