      <div class="col-sm-10">
                                <select id="is_async" name="is_async" data-placeholder=""
                                        class="chosen-select form-control m-b" tabindex="2">
                                    <option value="true" mytype="">是</option>
                                    <option value="false" mytype="" selected>否</option>
                                </select>
                            </div>
                        </div>

                    