A Summer at Grandpa's (1984)

When a young brother and sister spend a pivotal summer away from home, they are changed. Ting-Ting and Tung-Tung (Wang Qiguang) are children of the city, but when their mother is struck ill, they must leave Taipei, Taiwan, behind and spend the summer with their grandfather and grandmother (Mei Fang) in the country. As they wile away the days at play, the elder Tung-Tung is garnering glimpses of adult responsibility and is slowly growing to realize what it means to be a grownup. —Burly.