How many seed companies are there in Heilongjiang Province?

Ten kinds. The top ten seed companies in Heilongjiang Province are: China Seed Group Company, Liaoning East Asia Seed Industry Co., Ltd., Shandong Denghai Seed Industry Co., Ltd., Beijing Olkin Seed Industry Co., Ltd., Beijing Denong Seed Industry Co., Ltd., Shanxi Tunyu Seed Industry Technology Co., Ltd., Sichuan Guo Hao Seed Industry Co., Ltd., Heilongjiang Beidahuang Seed Industry Group Co., Ltd., Hefei Fengle Seed Industry Co., Ltd. and Yuan Longping Agricultural High-tech Co., Ltd.