BEIJING, Oct. 31 (Xinhua) — China's securities regulator has approved the initial public offering (IPO) registration of five companies on the country's NASDAQ-style ChiNext board. Hunan Dajia Weikang Pharmaceutical Industry Co., Ltd., Ningbo Joy Smart Technology Co., Ltd., Tongling Jieya Biologic Technology Co., Ltd., Yingkou Fengguang Advanced Material Co., Ltd. and Anhui Provincial Architectural Design and Research Institute Co., Ltd. will be listed on the Shenzhen Stock Exchange's board of growth enterprises, the ChiNext board, according to the China Securities Regulatory Commission. The companies and their underwriters will confirm the IPO dates and publish their prospectuses following discussions with the…