According to Chinese customs regulations, the amount of RMB that individuals can bring in from abroad is limited. The maximum amount of cash in RMB that one person can carry at a time is 20,000 RMB. If this limit is exceeded, the carrier must declare it and may face corresponding inspections.

Regarding the cash-out of virtual currency and the situation of returning to mainland China, cashing out virtual currency and cross-border capital flow is usually not simple, involving issues related to banks and payment channels. China has strict regulatory policies on virtual currency transactions and capital flows, and virtual currency trading platforms have been banned, so converting virtual currency to RMB and making cross-border remittances through traditional financial channels may encounter high regulatory difficulties.

Specific operational suggestions are as follows:

1. Understand relevant policies: If you plan to legally cash out virtual currency into RMB and transfer it back to China, it is best to understand the latest capital flow and foreign exchange management policies.

2. Choose legal platforms: Ensure to select compliant banks or payment institutions to handle relevant cross-border remittances.

3. Cross-border remittance declaration: For funds exceeding the specified amount, declaration must be made to customs and banks. Assets involving virtual currency must comply with relevant Chinese laws and regulations to avoid illegal fund transfers.

If you wish to transfer funds through virtual currency, you may need to consider legal cryptocurrency trading platforms or other financial institutions, but you must comply with China's regulatory requirements.