Visitors wearing face masks walk past Chinese artist Yue Minjun art piece named "Self-portrait", depicting himself while grinning with his mouth gaping, at collectibles Sotheby's show in Hong Kong

masterpiece art canvas sothebys collectibles collection culture cultural heritage show event exhibition icon iconic hang painting print prints auction pricy luxury luxurious yue minjun minjun selfportrait portrait artist china chinese painter oil painting visitors visitor face mask face mask masks