China's trademark law came into force on March 1, 1982. Although it was revised twice in 1993 and 21, the provisions on the validity period and renewal of trademarks have not changed.

Therefore, the trademark of "Sunflower" in the case began to be preliminarily approved and announced on January 2, 1993, and the announcement period was three months. The exclusive right of its trademark should be from April 19, 1993 to April 18, 23. The last time for trademark extension shall be October 17, 23. On October 15th, 23, Company A submitted a valid application for renewal.