'integer', ]; public static function columnLabels(): array { return [ 'company_name' => '公司名称', 'final_tax_performance' => '最终税务业绩', 'product_cost' => '产品成本', 'logistics_cost' => '物流成本', 'platform_invoice' => '平台开票', 'labor_cost' => '人工成本', 'other_expenses' => '其他费用', 'profit' => '利润', ]; } }