Tycoon Li Ka-shing and his family-backed conglomerate, along with Henderson Land Development and the Lee Shau Kee Foundation, have pledged 15 million yuan (US$2.2 million) each to support relief efforts for victims of the deadly flash floods along the Nepal-Tibet border. Li family-owned CK Asset Holdings, CK Hutchison Holdings and the Li Ka Shing Foundation, as well as Henderson Land and the Lee…