Most U tokens withdrawn from MEXC are now being avoided by most U-card providers and exchanges, as doing so could easily trigger scrutiny or even account freezes. This isn't just ordinary risk control; it's a newly implemented measure taking effect. Platforms are proactively mitigating risk, and on-chain analysis is becoming increasingly rigorous. Simply transferring funds through a wallet cannot erase the source of the funds. Currently, the relatively compliant approaches are: 1. Keep the funds in your own wallet first; this is the safest option. 2. If the source is clear, keep your withdrawal records and supporting documentation. Some platforms will require supplementary materials for manual review. 3. Use the funds directly on the blockchain if possible, but avoid using multiple hops or mixing tokens to erase the source. 4. P2P or OTC transactions are also acceptable, but choose reputable counterparties and proactively clarify the source. Currently, there's no particularly clean and quick way to compliantly deposit funds into mainstream platforms. The most practical approach is to first keep the funds in your wallet, prepare all necessary documentation, and then contact each platform's customer service to inquire about formal review procedures. (For reference only, purely personal opinion)