Seamless Green China (Holdings) Limited, an investment holding company incorporated in 2001 and headquartered in Sheung Wan, Hong Kong, manufactures and trades LED and related products in the People's Republic of China and Hong Kong; it operates through four segments encompassing LED products, optoelectronic products including those for watch and Internet cable applications, liquor and wine trading, and synthetic sapphire watch crystals; the company additionally manufactures and sells watch crystals for watch products, trades optoelectronic products, integrated circuits, software, and fashion items, and engages in property investment activities targeting municipalities and manufacturers primarily in China and Hong Kong. In April 2024, the Hong Kong Stock Exchange cancelled the listing of the company's shares under GEM Rule 9.14A(1) following failure to resume trading by April 2 after suspension since April 3, 2023, and non-fulfillment of resumption guidance; trading in its shares (ticker: 8150.HK) had been halted amid ongoing compliance issues with no reported recent partnerships, funding rounds, acquisitions, or new product launches in 2024 or 2025.