Abstract On the afternoon of August 8, the first phase of the "Yellow River Lecture Hall" was opened in the conference room on the first floor of the Superhard Materials Division! The lecturer is the master of the development of Wang Yanfei, the subject of the lecture is "The Appreciation and Evaluation of Diamonds", from the various departments of the logistics department of the business department and the branch...
On the afternoon of August 8, the first phase of the "Yellow River Lecture Hall" was opened in the conference room on the first floor of the Superhard Materials Division! The lecturer is the master of the development of Wang Yanfei, the subject of the lecture is "The Appreciation and Evaluation of Diamonds". More than 30 people from various departments of the logistics department of the business department and the branch participated in the lecture. 

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