问小程序openDocument里的路径只能从downloadFile的返回获取？不能是本地路径？

wx.downloadFile({
            url: '../../docs/111.docx',
            success: function (res) {
                console.log(res)
              var filePath = res.tempFilePath
              wx.openDocument({
                filePath: filePath,
                success: function (res) {
                  console.log('打开文档成功')
                }
              })
            }   
          })