Hmm, the user is asking how to cancel check-in on the Trip.com app. Let me analyze the search results I received - they seem to be unrelated to travel apps. The results include new media analytics platforms, market research firms, medical databases, and biotechnology resources. None of these address airline check-in cancellation.

This appears to be a common travel-related query, so I should provide clear guidance despite the irrelevant search outcomes. The user likely needs step-by-step instructions for their upcoming trip.
I recall that Trip.com's check-in cancellation process typically involves:

• Accessing the itinerary in the app
• Finding the check-in section
• Selecting cancellation option
• Confirming the action

Since the automated search didn't yield relevant results, I'll draw from general knowledge of travel apps. The user might be in a hurry preparing for their flight, so I'll structure the steps simply and include important considerations like timing restrictions and baggage implications.

I should also mention that policies vary by airline, so they should check specific terms. The tone should remain helpful and patient since travel procedures can be stressful.