Osman Landscape consultancy Co.Ltd of Xiamen and Osman International (Hong Kong) Co.Ltd are the subordinate institutions of American Otis Mann Design Co.

• 澳斯曼厦门景观设计顾问有限公司和澳斯曼国际（香港）有限公司，是美国澳斯曼设计公司American Otis Mann Design Co.