Update README.md

README.md

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 The Knowledge Engineering Group (**KEG**) & Data Mining (THUDM) at Tsinghua University. 
 
-We build LLMs: 
+We build **LLMs**: 
 
 * **[ChatGLM](https://github.com/THUDM/ChatGLM3)**: Open Bilingual Chat LLMs, among which the ChatGLM-6B series has attracted **10,000,000** downloads on HF. 
 * **[CodeGeeX](https://github.com/THUDM/CodeGeeX2)**: A Multilingual Code Generation Model (KDD 2023)
@@ -20,23 +20,23 @@ We build LLMs:
 * **[CogVideo](https://github.com/THUDM/CogVideo)**: An Open Text-to-Video Generation Model (ICLR 2023)
 * **[AgentTuning](https://github.com/THUDM/AgentTuning)**: Enabling Generalized Agent Abilities for LLMs
 
-We also work on LLM evaluations: 
+We also work on **LLM evaluations**: 
 * **[AgentBench](https://github.com/THUDM/AgentBench)**: A Benchmark to Evaluate LLMs as Agents
 * **[LongBench](https://github.com/THUDM/LongBench)**: A Bilingual, Multitask Benchmark for Long Context Understanding
  
 
-We also pre-train graph neural networks:
+We also **pre-train graph neural networks**:
 * **[CogDL](https://github.com/THUDM/CogDL)**: A Library for Graph Deep Learning (WWW 2023)
 * **[GraphMAE](https://github.com/THUDM/GraphMAE)**: (Generative) Masked Graph Neural Network Pre-Training. (KDD 2022 & [WWW 2023](https://github.com/THUDM/GraphMAE2))
 * **[GPT-GNN](https://github.com/acbull/GPT-GNN)**: Generative Graph Neural Network Pre-Training (KDD 2020, MSR, UCLA).  
 * **[GCC](https://github.com/THUDM/CogDL)**: Constrative Graph Neural Network Pre-Training (KDD 2020)
 * **[SelfKG](https://github.com/THUDM/SelfKG)**: Self-Supervised Learning for Knowledge Graphs (WWW 2022)
 
-We also work on graph embedding theory and system: 
+We also work on **graph embedding theory, algorithms, and systems**: 
 * **[SketchNE](https://github.com/THU-numbda/SketchNE)**: Embedding Billion-Scale Networks Accurately in One Hour (TKDE 2023)
 * **[ProNE](https://github.com/THUDM/ProNE)**: Embedding Networks of 100 Million Nodes with 10-400 Speedup (IJCAI 2019)
 * **[NetSMF](https://github.com/xptree/NetSMF)**: Embedding Networks of 100 Million Nodes (WWW 2019)
 * **[NetMF](https://github.com/xptree/NetMF)**: Understanding DeepWalk, LINE, PTE, and node2vec as Matrix Factorization (WSDM 2018)
 
-We started with graphs and networks, and always love them: 
+We started with **social networks and graphs**, and always love them: 
 * **[AMiner](https://www.aminer.cn/)**: An Academic Search and Mining System Since 2006 (KDD 2008, ACM SIGKDD Test of Time Award)