Caitong Securities Co., Ltd.
Regarding
Ningbo Huikang Industrial Technology Co., Ltd.
Initial Public Offering of Shares and Listing
Issuance Sponsorship Letter
Sponsor (Lead Underwriter)
(Address: Caitong Shuangguan Building, West Building, No. 198 Tianmushan Road, Xihu District, Hangzhou)
April 2026
Ningbo Huikang Industrial Technology Co., Ltd. Issuance Sponsorship Letter for Initial Public Offering and Listing Statement Caitong Securities Co., Ltd. (hereinafter referred to as “ Caitong Securities ” “ Sponsoring Institution ” or “ Sponsor ” ) Accepting the entrustment of Ningbo Huikang Industrial Technology Co., Ltd. (hereinafter referred to as “ Huikang Technology ” “ Company ” or “ Issuer ” ) to act as its sponsoring institution for the initial public offering of shares and listing on the main board, we hereby issue this issuance sponsorship letter for the project of the initial public offering of shares and listing on the main board ( hereinafter referred to as “ This Offering Listing ” ).
Caitong Securities and its Sponsoring Representatives in accordance with the Company Law of the People's Republic of China (hereinafter referred to as the “Company Law” ), the Securities Law of the People's Republic of China (hereinafter referred to as the “Securities Law ), the Administrative Measures for the Registration of Initial Public Offerings of Shares (hereinafter referred to as the “Registration Management Measures” ), the Administrative Measures for the Sponsorship of Securities Issuance and Listing ,