Update Adopters' Industry Category (pingcap#524)

Updated certain adopters' industry category with more standard and well-understood names.

adopters.md

@@ -15,12 +15,12 @@ This is a list of TiDB adopters in various industries.
 - [Toutiao (Media)](https://www.crunchbase.com/organization/toutiao)
 - [Phoenix New Media (Media)](http://ir.ifeng.com/phoenix.zhtml?c=242799&p=irol-irhome)
 - [LeCloud (MediaTech)](http://www.lecloud.com/en-us/)
-- [Mobikok (Marketing)](http://www.kokmobi.com/en/cn/index.asp)
-- [Ping++ (Payment)](https://www.crunchbase.com/organization/ping-5)
+- [Mobikok (AdTech)](http://www.kokmobi.com/en/cn/index.asp)
+- [Ping++ (Mobile Payment)](https://www.crunchbase.com/organization/ping-5)
 - [Qunar.com (Travel)](https://www.crunchbase.com/organization/qunar-com)
 - [LY.com (Travel)](https://www.crunchbase.com/organization/ly-com)
 - [LinkDoc Technology (HealthTech)](https://www.crunchbase.com/organization/linkdoc-technology)
-- [WEIRUIDA (Measurement and Control)](https://pitchbook.com/profiles/company/161294-41)
+- [WEIRUIDA (Clean Energy and Data Analytics)](https://pitchbook.com/profiles/company/161294-41)
 - [Yuanfudao (EdTech)](https://www.crunchbase.com/organization/yuanfudao)
 - [360 Financial (FinTech)](https://jinrong.360jie.com.cn/)
 - [China Telecom BestPay (FinTech)](https://www.bestpay.com.cn/global/oig/index.html)
@@ -34,4 +34,4 @@ This is a list of TiDB adopters in various industries.
 - [G7 (Internet of Things)](https://www.english.g7.com.cn/)
 - [Yimian Data (Big Data)](https://www.yimian.com.cn)
 - [Qingdao Telaidian (Electric Car Charger)](https://www.teld.cn/)
-- [Wanda Internet Technology Group (Big Data)](http://www.wanda-tech.cn/en/)
+- [Wanda Internet Technology Group (Big Data)](http://www.wanda-tech.cn/en/)