今年12月26日是毛泽东同志诞辰111周年纪念日。不久前,接到一封特别的来信,这封信是当年负责生产石英玻璃和半导体材料的秘密工厂--北京玻璃总厂605分厂技术科理化实验室曹金瑞工程师特意写给笔者的。年近70高龄的曹工是当年亲自参与研制毛泽东同志水晶棺材的技术工程人员之一。曹工联系了当年和他一起参加水晶棺理化性能实验,如今已经71岁高龄的老同事杨俊英女士,两位老人愿意将如今不再保密的水晶棺研制过程公之于众。 December 26 this year marks the 111th anniversary of Comrade Mao Zedong’s birth. Not long ago, I received a special letter from the author in charge of the production of quartz glass and semi-conductor materials. Nearly 70-year-old Cao workers personally involved in the development of Comrade Mao Zedong crystal coffin one of the technical engineers. Cao workers contacted him to join the Crystal coffin physical and chemical performance experiments, and now has a 71-year-old colleague Ms. Yang Junying, the two old people are willing to confidentiality of the Crystal coffin development process is now unknown to the public.