On December 28, 2015, the National Foundry Standardization Technical Committee held a standard review meeting in Baoding, where three industrial standards drafted by the Group were Cast Aluminum Alloy Metallography Part 1: Cast Aluminum Silicon Alloy Modification (JB/T 7946.1), Cast Aluminum Alloy Metallography Part 2: Cast Aluminum Silicon Alloy Overburning (JB/T 7946.2) Metallography of Cast Aluminum Alloys - Part 3: Pinhole of Cast Aluminum Alloys (JB/T 7946.3) and other standards were reviewed. According to the agenda of the meeting, Zhang Yin, Deputy Secretary General of the National Foundry Standards Committee, introduced the working process and requirements for standard review. Personnel from the Technical Research Center of Lizhong Alloy Group, the main drafting unit, reported the content of the standard text item by item, and defended and revised the questions raised by experts. After voting at the meeting, Three standards drafted by Lizhong Group passed the examination and approval successfully. Sixteen representatives from universities and peer enterprises across the country participated in the meeting as review experts. After the review meeting, the participants will visit the Technology Research Center and relevant production lines of Lizhong Group.