上期所：对相关客户在锡、白银期货品种上采取限制开仓、限制出金监管措施

Core Viewpoint - The Shanghai Futures Exchange has implemented regulatory measures restricting trading and withdrawals for certain clients involved in tin and silver futures due to suspected undisclosed control relationships [1] Group 1 - The Shanghai Futures Exchange identified 18 clients across 3 groups suspected of failing to declare actual control relationships in trading activities [1] - Regulatory measures include a one-month restriction on opening new positions and limitations on withdrawals for the affected clients in tin and silver futures [1] - The actions are in accordance with the trading rules and account management guidelines of the Shanghai Futures Exchange [1]