合同的第一部分叫做"parties"也就是合同的开场白（commencement),内容在说明当事人姓名或名称、国籍或注册地国及注册地或主营业地、订约日期包括各自在合同中的简称等等。如：

1.This Contract is made by and between China National Chemicals Import & Export Corporation,        Beijing China (hereinafter called the Buyers) and         ,         Canada(hereinafter called the Sellers) whereby the Buyer agrees to buy and the Sellers agrees to sell the under-mentioned commodity on the following terms and conditions:

本合同由中国中国北京化工进出口公司（以下简称买方），地址：中国北京       ，与        公司（以下简称卖方），地址：加拿大       订立，经双方同意根据按下列条款由买方购进并由卖方出售下列货物：

2.EMPLOYMENT AGREEMENT is made and entered into on         day of         (month),        (year), by and between:             

(hereinafter referred to as the "Company"), a corporation organized and existing under the laws of the State of          , with its registered office located at        , and        (hereinafter referred to as the "Employee"), an individual, with nationality of (Passport No.         ) residing at         .

本聘用协议于  年_月_日签订，双方当事人为：

依_州法律组织设立的       公司 (以下简称本公司) ， 主营业地为       ，与       国籍的 (护照号码:         )(以下简称雇员), 居住于       。

3.This Distribution AND License Agreement (this "Agreement"), dated as of December 15, 2017 (the "Effective Date"), is entered into between     , a company operating under the approval of the Shanghai Municipal Government of the People’s Republic of China, with its principal office located at       ("Distributor") and      , a Delaware corporation, with its principal office located at      ("Seller", and together with Distributor, the "Parties", and each, a "party").

本经销许可协议（“本协议”）由下列双方于2017年12月15日（“生效日”）签署：     ，一家根据中华人民共和国上海市政府批准经营的公司，地址位于：     （“经销商”）；和     , 一家特拉华州公司，主营业地位于     （“卖方”，于经销商合称为“双方”，单独成为“一方”）。

4.This Exclusive Option Agreement (hereinafter referred to as this “Agreement”) was entered into by and among the following parties on September 25, 2019 in Beijing, China:

Party A:          

Party B:          

Party C:          

In this Agreement, Party A, Party B, and Party C are individually referred to as a “Party”, and collectively referred to as the “Parties”.

本独家购买权合同（下称“本合同”）由以下各方于2019年9月25日在中国北京签订：

甲方：         

乙方：          

丙方：         

在本合同中，甲方、乙方和丙方以下各称“一方”，合称“各方”。