local root = {
    {
        boxId = 1001,
        itemId = 10001,
        weightByPrice = 100
    },
    {
        boxId = 1001,
        itemId = 10101,
        weightByPrice = 100
    },
    {
        boxId = 1002,
        itemId = 10001,
        weightByPrice = 100
    },
    {
        boxId = 1002,
        itemId = 10003,
        weightByPrice = 100
    }
}
return root