World Brand Technology (300522.SZ): For products of M9 level or above, which are higher grades, are currently only in the research and development reserve stage and have not yet entered mass production.

Wisdom News APP, Hemeing Technology (300522.SZ) announced a serious abnormal fluctuation in stock trading. As of the date of the announcement, the company's electronic grade hydrocarbon resin product achieved operating income of 1.823 million yuan in 2026, accounting for approximately 0.25% of the company's audited consolidated operating income in 2025, and has not yet formed a large-scale sales. The company has not supplied to downstream manufacturers such as Guangdong Shengyi Technology Co., Ltd., Taiguang Electronic Materials Co., Ltd., and Lianmao Electronics (Hong Kong) Co., Ltd., and is currently in the sampling and product verification stage.