Perusahaan yang terdaftar di Singapura: 7 Maret 1969

2 perusahaan

TECHNICAL STRUCTURES (PRIVATE) LIMITED. Kode pendaftaran: 196900122C Alamat hukum: 4 BATTERY ROAD, #12-00, BANK OF CHINA BUILDING, 049908, Singapore

TSAI YEN & CO. (PTE.) LIMITED Kode pendaftaran: 196900121K Alamat hukum: 20 RAMBUTAN ROAD, 424299, Singapore