LTW3/data/item/loot_tables/chests/test.json

{
    "type": "minecraft:chest",
    "pools": [
      {
        "rolls": 1,
        "entries": [
          {
            "type": "minecraft:item",
            "weight": 1,
            "functions": [
              {
                "function": "minecraft:set_damage",
                "damage": {
                  "min": 0.1,
                  "max": 0.5
                }
              },
              {
                "function": "minecraft:enchant_randomly"
              },
              {
                "function": "minecraft:set_nbt",
                "tag": "{\"is_bonus\":1b,\"bonus_new\":1b,\"bonus_return\":1b,\"item_name\":\"\\\"弓\\\"\",\"bonus_give_items\":[{\"id\":\"minecraft:arrow\",\"Count\":64,\"tag\":{\"is_bonus\":1b}}]}"
              }
            ],
            "name": "minecraft:bow"
          }
        ]
      }
    ]
  }