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index dcc242e8e0655b37d51ccf10eef2d88488127dd4..a6faa8163c9a04d3d31e4b65ff357c7c499e9eff 100644
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@@ -28,17 +28,17 @@
   <div class="pagebody">
     <div class="pagenav">
         <div onclick="goTo(document.getElementById('one'))"><span id="subtitle1"
-                style="color: green;">Introduction</span></div>
+                style="color: green;"><strong>Introduction</strong></span></div>
         <div onclick="goTo(document.getElementById('two'))"><span id="subtitle2"
-                style="color: green;">What Is the Problem?</span></div>
+                style="color: green;"><strong>What Is the Problem?</strong></span></div>
         <div onclick="goTo(document.getElementById('three'))"><span id="subtitle3"
-                style="color: green;">Current Solutions</span></div>
+                style="color: green;"><strong>Current Solutions</strong></span></div>
         <div onclick="goTo(document.getElementById('four'))"><span id="subtitle4"
-                style="color: green;">Policy Support</span></div>
+                style="color: green;"><strong>Policy Support</strong></span></div>
         <div onclick="goTo(document.getElementById('five'))"><span id="subtitle5"
-                style="color: green;">The Project</span></div>
+                style="color: green;"><strong>The Project</strong></span></div>
         <div onclick="goTo(document.getElementById('six'))"><span id="subtitle6"
-                style="color: green;">Reference</span></div>
+                style="color: green;"><strong>Reference</strong></span></div>
     </div>
       <div class="pagecontent">
           <!-- 1 -->
@@ -75,7 +75,7 @@
                   <img src="https://static.igem.wiki/teams/5303/description/9-1.png" alt="">
                 </div>
                 <span class="figure-font">Fig.4 5-ALA structural diagram</span>
-              <p>At present, 5-ALA is mainly synthesized by chemical synthesis and microbial fermentation. The study of chemical synthesis began in the 50s of the 20th century, and was most active in the 90s. The researchers synthesized 5-ALA [9] using raw materials such as hippuric acid, succinic acid, tetrahydrofurfuramine, and levulinic acid. However, the chemical synthesis method has the disadvantages of high price, difficult to obtain, high toxicity, low production yield and harsh reaction conditions, and the synthetic products contain impurities that are difficult to determine, which may cause potential harm to agricultural and forestry  [8]. <strong>In this project, <i>E. coli</i> was used as the chassis to screen strains that can produce stable and high yields of 5-ALA through enzyme modification, CRISPR transposition, and microfluidic high-throughput screening</strong>. Finally, the efficient and sustainable production of 5-ALA will be realized, thereby reducing the cost of biopesticides and contributing to the alleviation of the global food crisis. </p >
+              <p>At present, 5-ALA is mainly synthesized by chemical synthesis and microbial fermentation. The study of chemical synthesis began in the 50s of the 20th century, and was most active in the 90s. The researchers synthesized 5-ALA [9] using raw materials such as hippuric acid, succinic acid, tetrahydrofurfuramine, and levulinic acid. However, the chemical synthesis method has the disadvantages of high price, difficult to obtain, high toxicity, low production yield and harsh reaction conditions, and the synthetic products contain impurities that are difficult to determine, which may cause potential harm to agricultural and forestry  [8]. <strong>In this project, <i>E. coli</i> was used as the chassis to screen strains that can produce stable and high yields of 5-ALA through enzyme modification, CRISPR-associated transposons (CASTs) system, and microfluidic high-throughput screening</strong>. Finally, the efficient and sustainable production of 5-ALA will be realized, thereby reducing the cost of biopesticides and contributing to the alleviation of the global food crisis. </p >
           </div>
           <div class="h" id="four">
             <div class="h1">Policy Support</div>