diff --git a/doc/bgp_loading_optimization/bgp-loading-optimization-hld.md b/doc/bgp_loading_optimization/bgp-loading-optimization-hld.md
index b8b6a9c1856..3ef50e9feed 100644
--- a/doc/bgp_loading_optimization/bgp-loading-optimization-hld.md
+++ b/doc/bgp_loading_optimization/bgp-loading-optimization-hld.md
@@ -28,18 +28,14 @@
   - [Synchronous sairedis API usage](#synchronous-sairedis-api-usage)
 - [Requirements](#requirements)
 - [High-Level Proposal](#high-level-proposal)
-  - [1. Reduce Redis I/O traffic between Fpmsyncd and Orchagent](#1-reduce-redis-io-traffic-between-fpmsyncd-and-orchagent)
-    - [1.1 Remove _PUBLISH_  in the lua script](#11-remove-publish--in-the-lua-script)
-    - [1.2 Reduce pipeline flush frequency](#12-reduce-pipeline-flush-frequency)
-    - [1.3 Discard the state table with prefix \_](#13-discard-the-state-table-with-prefix-_)
+  - [1. Improve I/O performance between Fpmsyncd and Orchagent with ZMQ](#1-improve-io-performance-between-fpmsyncd-and-orchagent-with-zmq)
   - [2. Add an assistant thread to the monolithic Orchagent/Syncd main event loop workflow](#2-add-an-assistant-thread-to-the-monolithic-orchagentsyncd-main-event-loop-workflow)
   - [3. Asynchronous sairedis API usage](#3-asynchronous-sairedis-api-usage)
     - [New ResponseThread in OA](#new-responsethread-in-oa)
 - [Low-Level Implementation](#low-level-implementation)
   - [Fpmsyncd](#fpmsyncd)
-  - [Lua scripts](#lua-scripts)
-  - [Multi-threaded orchagent with a singleton ring buffer](#multi-threaded-orchagent-with-a-singleton-ring-buffer)
-  - [Syncd \[similar optimization to orchagent\]](#syncd-similar-optimization-to-orchagent)
+  - [Orchagent](#orchagent)
+  - [Syncd](#syncd)
   - [Asynchronous sairedis API usage and new  ResponseThread in orchagent](#asynchronous-sairedis-api-usage-and-new--responsethread-in-orchagent)
 - [WarmRestart scenario](#warmrestart-scenario)
 - [Testing Requirements/Design](#testing-requirementsdesign)
@@ -102,7 +98,7 @@ The whole BGP loading/withdrawing workflow is shown in the figure below:
 
 **NOTE**: [Linux kernel](https://github.com/SONiC-net/SONiC/wiki/Architecture#routing-state-interactions) part is ignored here.
 
-### Orchagent consumer workflow can improve by ZMQ
+### Orchagent consumer workflow is single-threaded
 
 Let's take the consumer for `ROUTE_TABLE` for example. In Orchagent's event-triggered main loop, Consumer would be selected to run its `execute()` API which contains three steps.