Cross-Domain Recommendation (CDR) aims to solve data sparsity and cold-start problems by utilizing a relatively information-rich source domain to improve the recommendation performance of the data-sparse target domain. However. most existing approaches rely on the assumption of centralized storage of user data. which undoubtedly poses a significant risk of user privacy leakage because... https://macorners.shop/product-category/heart-shaped-ring-gift-box/