Photo taken on April 3, 2013 shows an artwork from Shang Dynasty (1600 B.C. to 1100 B.C.) estimated at a price of 12 million to 16 million HKD (about 1.5 million to 2.1 million U.S. dollars) during the preview of the Hong Kong 2013 Spring Auctions held by China Guardian Auctions Co.Ltd in Hong Kong, south China. The two-day auctions will start on April 4, with over 300 pieces of paintings and calligraphy as well as ceramic artworks. (Xinhua/Li Peng)

Photo taken on April 3, 2013 shows a ceramic artwork from Qing Dynasty (1644-1911) estimated at a price of 3 million to 4 million HKD (about 390,000 to 500,000 U.S. dollars) during the preview of the Hong Kong 2013 Spring Auctions held by China Guardian Auctions Co.Ltd in Hong Kong, south China. The two-day auctions will start on April 4, with over 300 pieces of paintings and calligraphy as well as ceramic artworks. (Xinhua/Li Peng)

A buyer looks at a ceramic cup from Qing Dynasty (1644-1911) during the preview of the Hong Kong 2013 Spring Auctions held by China Guardian Auctions Co. Ltd in Hong Kong, south China, April 3, 2013. The two-day auctions will start on April 4, with over 300 pieces of paintings and calligraphy as well as ceramic artworks. (Xinhua/Li Peng)

Visitors look at a painting by Wu Hufan estimated at a price of 8 million to 12 million HKD (about 1 million to 1.5 million U.S. dollars) during the preview of the Hong Kong 2013 Spring Auctions held by China Guardian Auctions Co.Ltd in Hong Kong, south China, April 3, 2013. The two-day auctions will start on April 4, with over 300 pieces of paintings and calligraphy as well as ceramic artworks. (Xinhua/Li Peng)

Visitors look at paintings during the preview of the Hong Kong 2013 Spring Auctions held by China Guardian Auctions Co.Ltd in Hong Kong, south China, April 3, 2013. The two-day auctions will start on April 4, with over 300 pieces of paintings and calligraphy as well as ceramic artworks. (Xinhua/Li Peng)

Visitors look at artworks during the preview of the Hong Kong 2013 Spring Auctions held by China Guardian Auctions Co.Ltd in Hong Kong, south China, April 3, 2013. The two-day auctions will start on April 4, with over 300 pieces of paintings and calligraphy as well as ceramic artworks. (Xinhua/Li Peng)

A TV journalist shoots a painting by Zhang Daqian estimated at a price of 12 million to 15 million HKD (about 1.5 million to 1.9 million U.S. dollars) during the preview of the Hong Kong 2013 Spring Auctions held by China Guardian Auctions Co.Ltd in Hong Kong, south China, April 3, 2013. The two-day auctions will start on April 4, with over 300 pieces of paintings and calligraphy as well as ceramic artworks. (Xinhua/Li Peng)

Photo taken on April 3, 2013 shows a furniture from Qing Dynasty (1644-1911) estimated at a price of 3 million to 5 million HKD (about 390,000 to 600,000 U.S. dollars) during the preview of the Hong Kong 2013 Spring Auctions held by China Guardian Auctions Co.Ltd in Hong Kong, south China. The two-day auctions will start on April 4, with over 300 pieces of paintings and calligraphy as well as ceramic artworks. (Xinhua/Li Peng)

A visitor looks at a piece of furniture from Qing Dynasty (1644-1911) estimated at a price of 12 million to 22 million HKD (about 1.5 million to 2.8 million U.S. dollars) during the preview of the Hong Kong 2013 Spring Auctions held by China Guardian Auctions Co.Ltd in Hong Kong, south China, April 3, 2013. The two-day auctions will start on April 4, with over 300 pieces of paintings and calligraphy as well as ceramic artworks. (Xinhua/Li Peng)

Visitors look at a painting by Huang Zhou estimated at a price of 1.6 million to 2.6 million HKD (about 200,000 to 300,000 U.S. dollars) during the preview of the Hong Kong 2013 Spring Auctions held by China Guardian Auctions Co.Ltd in Hong Kong, south China, April 3, 2013. The two-day auctions will start on April 4, with over 300 pieces of paintings and calligraphy as well as ceramic artworks. (Xinhua/Li Peng)

A visitor looks at artworks during the preview of the Hong Kong 2013 Spring Auctions held by China Guardian Auctions Co.Ltd in Hong Kong, south China, April 3, 2013. The two-day auctions will start on April 4, with over 300 pieces of paintings and calligraphy as well as ceramic artworks. (Xinhua/Li Peng)