Any duplication in part or in full must mention the title and clearly accredit the copyright owner, Ho Koon Nature Education cum Astronomical Centre (Sponsored by Sik Sik Yuen).

• 任何部份或全部复制或转载必须清楚注明来源并鸣谢版权持有人，即可观自然教育中心暨天文馆(啬色园主办)。