He was the absolute center of attention at this launch event.
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culture
C位 = 'C position', where C stands for Center (read out as English 'C'). The term comes from idol groups and idol-survival shows like 创造101 — the C位 member is the face of the group on photoshoots and choreography. Now extended widely: 新车的C位 = the headline new car at an auto show, 咖位 (kāwèi) = star power.
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Casual / entertainment slang. Common phrases: 出道C位 (chūdào C wèi, debut center), 抢C位 (qiǎng C wèi, fight for the center spot), 站C位 (zhàn C wèi, take center stage).