Wen Fu Chuang

San Teh Ltd. is an investment holding company, which engages in the property development and investment, hotel, and polyvinyl chloride pipes and fittings businesses. It operates through the following segments: Investment Holding, Hotel and Properties, PVC Pipes and Fittings, and Others. The Investment Holding segment includes investment holding and administrative activities. The Hotel and Properties segment manages hotels and property development and investment. The PVC Pipes and Fittings segment manufactures and sells PVC pipes and fittings. The company was founded by Shin Ping Kao on April 11, 1979 and is headquartered in Singapore.

Memtech International Ltd. is an investment holding company, which engages in the manufacture and sale of precision plastic components. It operates through the following segments: Automotive, Mobile Communications, Consumer Electronics, and Industrial and Medical. The Automotive segment sells complex plastic components such as climate and audio controller, and decorative parts used in key fobs, body control, and infotainment systems. The Mobile Communications segment offers keypads, window and anti-reflective lens, waterproof housing, and plastic casings for mobile devices. The Consumer Electronics segment manufactures and distributes computer keyboards, speakers and headphones, routers and digital box housings, and remote controls. The Industrial and Medical segment refers to barcode scanners housing for medical diagnostics. The company was founded in 2000 and is headquartered in Singapore.

Part of ASE Technology Holding Co., Ltd., Memtech Technology Holdings Co. Ltd. distributes silicon rubber products supplied by Memtech International Ltd of Singapore. Memtech Technology Holdings Co. was acquired by Memtech International Ltd., part of ASE Technology Holding Co., Ltd. from July 29, 2019 on May 18, 2005 for $0.19 million.

Taitech Precision Electronic (Kunshan) Co. Ltd. is a Chinese company that specializes in manufacturing special dies, tools, jigs, and fixtures. The private company is based in Kunshan, China.

Keytech Investment Pte Ltd. operates as an investment holding Singaporean company. The private company is based in Singapore, Singapore.