The method to inquire and purchase Dadi Cinema membership card is as follows:

1. Open the official website of Dadi Cinema.

2. Click the "My" button to enter the "My Page".

3. Click the "Membership Card" button in "My Page" to enter the "My Membership Card Page".

4. Click the "Bind Card" button in the "My Membership Card Page" to enter the "Bind Card Page".

5. Enter the card number and card number password in the "Bind Card Page", and click the "Confirm Binding" button to check the purchase.

The above are the steps for inquiry and purchase of Dadi Cinema membership card. If you need to purchase a new membership card, you can also purchase it on Dadi Cinema’s official website or offline stores.