In an evening of modern dance blended with traditional Chinese forms, Lily Cai Chinese Dance Company presents its home season concert this weekend at the Fort Mason Center for Arts & Culture. The concert includes four pieces, and combines new work — this is the first showing of both “SenseScape II” and “Shifting” — with favorites like “SilkCascade” and “The Mist Beneath.” Company founder and director Lily Cai incorporates a wide range of ideas into the works, including contemplations on the forces of yin and yang, as well as movements inspired by the action painting of Jackson Pollock and the brushstrokes of Chinese calligraphy.