The Time-Traveling Savior

Luke Lawson, in an era of scarcity, supports his mother and siblings. Discovers a jade pendant, travels to modern society. Pendant allows time travel, item storage, time manipulation. Uses old coins/antiques for money, buys supplies for his world to rescue family. Saves refugee Lily, helps neighbors/friends, uses time travel for mutual aid. Proposes building reservoir, stockpiling grain for village, protecting community.