Despite repeated setbacks, Cai Guo-Qiang never gave up. In 2015, he chose to locate the project on a small fishing island off the coast of his hometown, Huiyu Island Port. This time, he did not seek government permission but instead fully self-funded the project. "Sky Ladder" is a ladder reaching 1,650 feet high, supported by a giant balloon and equipped with explosives. When this monumental sculpture was ignited, it created a miraculous fiery scene ascending to heaven, as if truly connecting Earth to the sky. This artwork is not only Cai Guo-Qiang's ultimate exploration of fireworks art but also a carefully prepared gift for his centenarian grandmother. He has worked on projects worldwide, but his grandmother has never seen them in person. He hoped that through "Sky Ladder," she could feel his love and respect for her.