At present, jewelry connoisseur, clock and watch collection and appreciation as well as manufacture great master, and research and development consultant of Beijing Watch Factory Co., ltd, Mr. Zhang Youxu and the father of Oriental Tourbillon Watch Xu Yaonan loved their apprentice, named Zhao Zhenling, aged 21, the worker of Beijing Watch Factory Co., ltd. In the ceremony of becoming an apprentice to master, in accordance with traditional China custom, Zhao Zhenling showed kotow to two great masters and tea to them. He is very interested in clock and watch, and successively self-designed and trial-manufactured three types of movement and samples of clock in his spare time. He took off balance spring on clock escapement and made new vibrating system, composed of two permanent magnets and escapement. And he succeeded in trial-manufacturing permanent magnet type of speed control mechanism. He designed pallets for watch and developed single fork and double escapement type of Tourbillon Relatif mechanism, composed of one pallet fork and two escapements hairspring. In addition, he also designed and trial-manufactured single vertical platoon clock core (popularly called one line).。

　　 Zhao Zhenling is loved and affirmed by many great masters insides due to his modest and hard study. This time, he was shown appreciation for by two great masters Xu Yaonan and Zhang Youxu and celebrated traditional and ceremonious ceremony of becoming an apprentice.

（On Dec 22, 2006）