QUALITY MANAGEMENT SYSTEM CERTIFICATION

Certificate
This is to certify the quality management system of
YANGQUAN CITY CHANGQING
OIL WELLS FOR AGENTS PRODUCTS CO., LTD.
ORGANIZATION CODE: 78328138-9
REG./ AUDIT ADD: NANPING VILLAGE, SHIMENKOU TOWNSHIP, PINGDING COUNTY, YANGQUAN CITY, SHANXI

is in conformity with
GB/T 19001-2008/ISO 9001:2008 Standard

The certificate is valid for the following scope:
PRODUCTION AND SERVICE OF OIL FRACTURING PROPPANT (CERAMIC SAND)

Issue Date: August 13^th,2015
Expiry Date: August 12^th,2018

Within the certificate validity, the organization must pass the annual surveillance audit and get the mark before the prescribed date. The certificate is valid ONLY if the mark is present since the first surveillance audit.

Remark: Provisions for the use of certificate in accordance with the last edition of Certificate and Certification Mark Rules in Certification Rules of ZJQC. To verity validity of the certificate, please see the official website of CNCA www.cnca.gov.cn.

Beijing Zhongjing Quality Certification Co., Ltd.
General Manager:

The first surveillance audit
The second surveillance audit
The third surveillance audit Date: August 13^th 2015

Management System
CNAS C044-Q

Address, 5/F, South Building, Guoyi Hotel, No.1, Wenxing East Street, Xicheng District, Beijing, China

To verify the certificate validity, please browse our website http://www.zjqc.com

INVENTION PATENT

Name of invention: ceramic proppant and preparation method

Inventor: Xiaojuan Ma, Jinghua Hao, Peiping Wang

Patent No: ZL 2009 1 0140476.4

Patent Application Date: May 15^th,2009

Patentee: YANGQUAN CITY CHANGQING OIL WELLS FOR AGENTS PRODUCTS CO., LTD.

Authorized Announcement Date: August 17^th,2011

After preliminary examination of this utility model in accordance with the Patent Law of the People’s Republic of China, this department has decided to grant a patent and issue a certificate to the design, and register the same in the patent rolls. The patent rights shall commence from the date of notice of authorization.

The duration of protection for this patent is twenty years from the date of patent application. The patent holder shall remit annual fees in compliance with the stipulated implementing regulations of the patent laws. The patent annuity shall be submitted before 15th of May every year. Failure to do so shall result in the termination of the patent rights after the expiry of the payment period.

The circumstances of law on the letter of patent at the time of registration, the transfer, mortgage, invalidation, cessation, resumption and the changes of the patent holder’s name, nationality and address, etc. shall be recorded in the patent rolls.

Director: Lipu Tian
August 17^th,2011

INVENTION PATENT

Name of invention: ceramic proppant for fracturing of oil and gas and preparation method

Inventor: Pinbo Bai, Zhangang Li, Xiaojuan Ma, Yuming Tian, Yuesheng Chai

Patent No: ZL 2013 1 0477445.4

Patent Application Date: October 14^th, 2013

Patentee:
YANGQUAN CITY CHANGQING OIL WELLS FOR AGENTS PRODUCTS CO., LTD.
YANGQUAN ZHONGYONG CERAMIC PROPPANT CO., LTD.
TAIYUAN TECHNOLOGY UNIVERSITY

Authorized Announcement Date: February 03^rd,2016

After preliminary examination of this utility model in accordance with the Patent Law of the People’s Republic of China, this department has decided to grant a patent and issue a certificate to the design, and register the same in the patent rolls. The patent rights shall commence from the date of notice of authorization.

The duration of protection for this patent is twenty years from the date of patent application. The patent holder shall remit annual fees in compliance with the stipulated implementing regulations of the patent laws. The patent annuity shall be submitted before 14th of October every year. Failure to do so shall result in the termination of the patent rights after the expiry of the payment period.

The circumstances of law on the letter of patent at the time of registration, the transfer, mortgage, invalidation, cessation, resumption and the changes of the patent holder’s name, nationality and address, etc. shall be recorded in the patent rolls.

Director: Changyu Shen
February 03^rd,2016

INVENTION PATENT

Name of invention: low density ceramic proppant and preparation method

Inventor: Zhangang Li, Xiaojuan Ma, Jinghua Hao

Patent No: ZL 2010 1 0136972.5

Patent Application Date: March 31^st,2010

Patentee: YANGQUAN CITY CHANGQING OIL WELLS FOR AGENTS PRODUCTS CO., LTD.

Authorized Announcement Date: November 14^th,2012

After preliminary examination of this utility model in accordance with the Patent Law of the People’s Republic of China, this department has decided to grant a patent and issue a certificate to the design, and register the same in the patent rolls. The patent rights shall commence from the date of notice of authorization.

The duration of protection for this patent is twenty years from the date of patent application. The patent holder shall remit annual fees in compliance with the stipulated implementing regulations of the patent laws. The patent annuity shall be submitted before 31th of March every year. Failure to do so shall result in the termination of the patent rights after the expiry of the payment period.

The circumstances of law on the letter of patent at the time of registration, the transfer, mortgage, invalidation, cessation, resumption and the changes of the patent holder’s name, nationality and address, etc. shall be recorded in the patent rolls.

Director: Lipu Tian
November 14^th,2012

INVENTION PATENT

Name of invention: one kind of resin coated proppant and preparation method

Inventor: Weimin Zhang, Yonggang Zhu, Zhangang Li, Chuanyou Meng, Xiaojuan Ma, Mengyun Zhao, Suobing Zhang, Li Chen

Patent No: ZL 2013 1 0318393.6

Patent Application Date: July 26^th,2013

Patentee: BEIJING QIXIANGDA TECHNOLOGY CO., LTD.
YANGQUAN ZHONGYONG CERAMIC PROPPANT CO., LTD.

Authorized Announcement Date: December 09^th,2015

After preliminary examination of this utility model in accordance with the Patent Law of the People’s Republic of China, this department has decided to grant a patent and issue a certificate to the design, and register the same in the patent rolls. The patent rights shall commence from the date of notice of authorization.

The duration of protection for this patent is twenty years from the date of patent application. The patent holder shall remit annual fees in compliance with the stipulated implementing regulations of the patent laws. The patent annuity shall be submitted before 26th of July every year. Failure to do so shall result in the termination of the patent rights after the expiry of the payment period.

The circumstances of law on the letter of patent at the time of registration, the transfer, mortgage, invalidation, cessation, resumption and the changes of the patent holder’s name, nationality and address, etc. shall be recorded in the patent rolls.

Director: Changyu Shen
December 09^th,2015

INVENTION PATENT

Name of invention: precured resin coated proppant and preparation method

Inventor: Zhangang Li, Xiaojuan Ma

Patent No: ZL 2009 1 0203794.0

Patent Application Date: June 16^th,2009

Patentee: YANGQUAN CITY CHANGQING OIL WELLS FOR AGENTS PRODUCTS CO., LTD.
Zhangang Li, Xiaojuan Ma

Authorized Announcement Date: January 11^th,2012

After preliminary examination of this utility model in accordance with the Patent Law of the People’s Republic of China, this department has decided to grant a patent and issue a certificate to the design, and register the same in the patent rolls. The patent rights shall commence from the date of notice of authorization.

The duration of protection for this patent is twenty years from the date of patent application. The patent holder shall remit annual fees in compliance with the stipulated implementing regulations of the patent laws. The patent annuity shall be submitted before 16th of June every year. Failure to do so shall result in the termination of the patent rights after the expiry of the payment period.

The circumstances of law on the letter of patent at the time of registration, the transfer, mortgage, invalidation, cessation, resumption and the changes of the patent holder’s name, nationality and address, etc. shall be recorded in the patent rolls.

Director: Lipu Tian
January 11^th,2012

INVENTION PATENT

Name of invention: resin pre-coated ceramic proppant and preparation method and application method

Inventor: Weimin Zhang, Zhangang Li, Zongtian Li, Yonggang Zhu, Chuanyou Meng, Li Chen

Patent No: ZL 2012 1 0093417.8

Patent Application Date: March 31^st, 2012

Patentee: BEIJING QIXIANGDA TECHNOLOGY CO., LTD.
YANGQUAN CITY CHANGQING OIL WELLS FOR AGENTS PRODUCTS CO., LTD.

Authorized Announcement Date: May 14^th,2014

After preliminary examination of this utility model in accordance with the Patent Law of the People’s Republic of China, this department has decided to grant a patent and issue a certificate to the design, and register the same in the patent rolls. The patent rights shall commence from the date of notice of authorization.

The duration of protection for this patent is twenty years from the date of patent application. The patent holder shall remit annual fees in compliance with the stipulated implementing regulations of the patent laws. The patent annuity shall be submitted before 31th of March every year. Failure to do so shall result in the termination of the patent rights after the expiry of the payment period.

The circumstances of law on the letter of patent at the time of registration, the transfer, mortgage, invalidation, cessation, resumption and the changes of the patent holder’s name, nationality and address, etc. shall be recorded in the patent rolls.

Director: Changyu Shen
May 14^th,2014