Hold the line, please differin gel 03 reviews Sun Art, a joint venture between Taiwan conglomerate Ruentex Group and privately held French retailer Groupe Auchan SA, currently has a 13.6 percent market share in China. CRE and Wal-Mart each have about 10.9 percent, while Carrefour has 6.9 percent and Tesco 2.4 percent.