The well-known High-tech Companies Served by Huaien are:

TSMC, AU Optronics Corporation（AUO）

Micron Memory Taiwan Co., Ltd.,

Delta Electronics, Inc.

Largan Precision Company Limited, Central Science Park

Tainan Science Park,

MGC Pure Chemicals Taiwan  Incorporated

Siliconware Precision Industries Co., Ltd, 

Corning Display Technologies Taiwan Co, Ltd

Lextar Electronics Corporation,

Nikko Metals Taiwan Co., Ltd.

Lextar Electronics Corporation in Hsinchu Science Park,

CHC Resources Corporation

Maxohip Electronics Corporation

Powerchip Semiconductor Manufacturing Corporation

Mitac Pacific Limited, United Renewable Energy Co., Ltd.

Qualcomm Display,

Far EasTone Telecommunications Co., Ltd etc.

Well-known Construction Companies served by Huaien Survey including:

Fu Tsu Construction, Continental Engineering Group

Chung-Lu Construction Co., Ltd, Liming Construction Co., Ltd

Far Eastern General Contractor Inc., Kedge Construction Co., Ltd.

Senyeh Construction Co., Ltd., Fujita Corporation Taipei Branch (Japan)

Reiju Construction Corporation, Chia Cheng Construction Co., Ltd.

Farglory Construction Co., Ltd, Te Chang Construction Group etc.

Public Works and Other Well-known Companies :

Taichung MRT CJ920 Surveying Works

Taichung Station Elevated Railway 3D Surveying Works

CF611 Taipei Loop Line Elevated Rail Construction Project,

Airport MRT

Taichung City Government Shuinan Trade and Economic Park

Sports Park Construction  Project in Taichung Harbor Area,

Taipei Main Station Building Intelligent Joint Disaster Prevention Center Construction Turnkey Project,

Macao Metro C360 Light Rail Phase I Construction Project

New construction of Taiwan Taoyuan International Airport  Tower and Overall Site

Dragon Steel Corporation

Taiwan Power Company

Taiwan Water Corporation

Elevated Railway of Taiwan Railway

FamilyMart,

Taoyuan Factory of Liberty Stationery Corporation New Construction

New Construction of Religious Facilities of Chung Tai Chan Monastery in Puli Township

Chuan Lian Enterprise Co., Ltd.

New Construction of Decathlon Taiwan in Taichung Beitun

New Construction of China Medical University in Shuinan

Building Extension Construction of YKK、Walsin Lihwa Corporation、YKK Taiwan Co., Ltd. Etc.