Sheng Yi Development Co., Ltd. (5455.TWO) operates as a real estate development company primarily engaged in the construction, leasing, and sale of residential buildings in Taiwan; wholesaling, leasing, and sales of interior decoration and building materials; and property rental businesses, with additional involvement in semiconductor burn-in systems and testing equipment alongside construction materials distribution. Founded in 1980 and headquartered at 11th Floor, No. 417, Section 2, Kung Dao Wu Road, Hsinchu City, Taiwan, the company, formerly known as Signality System Engineering Co., Ltd., underwent a significant name change in June 2017 to reflect its strategic pivot toward real estate development from prior semiconductor testing operations; it maintains a compact workforce of 19 employees and focuses on the Taiwan market with reported net sales growth to NT$3.62 billion in 2024 from NT$1.62 billion in 2023, driven by expanded real estate activities including a real estate development division that scaled from NT$600 million in 2022 to NT$3.62 billion in 2024. Recent financial performance highlights include net income of NT$382 million for 2024, earnings reports for Q2 and six months ended June 30, 2025, and Q1 ended March 31, 2025, alongside Q3 and nine months ended September 30, 2025, underscoring ongoing operational momentum in homebuilding without disclosed major acquisitions, partnerships, or new product launches in the past 1-2 years.