To find 3D movie sources on LeTV TV, follow these steps:

1. Access the LeTV TV platform.

2. Navigate to the "Movies" or "3D Movies" section.

3. Use the search function to look for specific 3D movies.

4. Browse through the available options and select the desired movie.

5. Confirm the selection and start streaming.

The reason for these steps is that LeTV TV, as a popular streaming platform in China, offers a wide range of content, including 3D movies. By navigating to the appropriate sections and using the search function, users can easily find and access 3D movies. According to a report by Statista, the number of 3D movie releases has been increasing annually, with a significant portion of these being available on streaming platforms like LeTV TV. This trend indicates a growing demand for 3D content, making it essential for users to know how to find these sources efficiently.