Create a Gantt for an e-commerce promotional campaign launch project.
Background: A cross-border e-commerce company is preparing a major sales event that requires coordination between product, design, engineering, operations, and marketing teams.

Include the key stages:
Requirement alignment → Planning & PRD → Design → Development → Testing → Pre-launch check → Launch → Monitoring → Post-project review.

Add decision points such as “Review approved?” and “Test passed?”.
Keep the structure clear and suitable for project management visualization.