Samsung Electronics is bringing together top executives from Hyundai Motor Group for an unprecedented gathering Monday, signaling closer ties between two of South Korea's largest conglomerates as they deepen cooperation in automotive chips, batteries and robotics. The event, called "Appreciation Day," was scheduled for Monday afternoon at Samsung's training center in Yongin, Gyeonggi Province, according to industry sources. About 170 executives and their spouses were expected to attend. Samsung