According to the relevant provisions of the Trademark Law of People's Republic of China (PRC), the registrant of a trademark enjoys the exclusive right to use its trademark and has the right to change the trademark, including the name of the trademark. Therefore, Shouguang Agricultural Store can change its trademark name. However, it should be noted that the change of trademark name needs to comply with the provisions of relevant laws and regulations and needs to be approved and registered by the Trademark Office. It is recommended that you consult relevant professional organizations or service organizations to understand the specific processes and requirements.