Not enough information is provided to answer the question. However, if you owe 30,000 yuan for an online loan and want to frankly explain the situation to your family and find a solution, you can consider the following steps:

1. Recognize and accept reality: admit that you have made a mistake and realize To the point where I need to confess to my family.

2. Carefully prepare: Organize relevant information and loan records to ensure full understanding and explanation.

3. Choose the right time and place: Choose a comfortable and private environment, and choose an appropriate time to talk frankly with your family.

4. Be honest: Express your remorse and guilt to your family while telling them the entire situation, including how the debt was incurred.

5. Propose a solution: Demonstrate a positive attitude toward solving the problem, such as developing a repayment plan, seeking help from friends and family, or finding other ways to solve your debt problem.

6. Accept responsibility: Commit to correct mistakes, avoid similar situations from happening again, and be willing to accept possible consequences.

7. Seek professional help: If you feel you can't cope alone, consider consulting a professional such as a financial planner or debt counselor.

Summary: Facing the problem honestly is the first step to solving the dilemma. Communicating transparently, making a plan, and asking for support can help you get through difficult situations and find solutions together with your family.