The China Eastern Airlines itinerary verification shows false, which may be due to the following reasons:

1. The printer ink cartridge is expired or damaged, causing the printed itinerary information to be unrecognizable.

2. When printing the itinerary, it was not connected to the TravelSky system, resulting in the information being unable to be verified.

3. Other unknown printing or verification problems.

To avoid this happening, you can try the following methods:

1. Make sure the printer is working properly and replace the ink cartridge in time.

2. Contact China Eastern Airlines customer service to ensure that the itinerary is connected to the TravelSky system.

3. If the problem still exists, it is recommended to file a complaint with the relevant department and seek a solution.