On October 14, 2022, Yingjie Technology Research and Development Holdings submitted a prospectus to the Hong Kong Stock Exchange for listing on the main board, with Ping An Insurance Capital (Hong Kong) as the exclusive sponsor.

Yingjie Technology Research and Development Holdings is a nanofiber technology developer rooted in Hong Kong, focusing on the use of nanofiber technology to improve product characteristics and quality, and launched the product "NASK" made of proprietary nanofiber layer. The company has successfully commercialized four kinds of respirator products, namely N99 respirator, ProNIOSHN95 respirator, ProCEFFP2 respirator and anti-pollution respirator. During the track record period, the company is also engaged in the sales and distribution of traditional Chinese medicine and health products. The company's existing product portfolio includes (I) respirators; and (ii) traditional Chinese medicine and health products.

In 2019, 2020, 2021 and the six months ended June 30, 2022, the company's largest customers accounted for about 10.7%, 60.8%, 87.8% and 46.7% of total revenue, respectively, while the five major customers accounted for about 41.6%, 84.2%, 93.9% and 69.8% of total revenue, respectively.

In 2021, the company was the largest supplier of respirators to customer C, the statutory body that manages all public hospitals in Hong Kong, and was the largest purchaser of respirators in Hong Kong in the same year according to the industry report.

From 2019 to 2021 and the first half of 2022, the company's revenue was HK $1.9 million, HK $111 million, HK $93.728 million and HK $46.015 million respectively, and its profit during the period was-HK $3.108 million, HK $62.3 million, HK $47.049 million and HK $15.33 million, respectively.

The company intends to use the funds raised to enhance its R & D capabilities to expand its product portfolio and technology applications; to replace and expand production facilities to meet growing market demand; to expand its sales and marketing network; to strengthen its IT management system to improve operational efficiency; to explore opportunities for strategic alliances; and to retain as general working capital.