What should a invitation letter include for China Visa?

The sample of invitation letter for China Visa is shown below:

Date: 2nd March 2016
To the Chinese Consulate:

We would like to invite the following individual to visit China for business purposes:

Name: Peter Johnson
Gender: Male
Date of Birth: 1970-04-01
Nationality: US Citizen
Passport Number: 12345678

Mr. Johnson is of The Company A
During the visit, he will meet with the office managers of Company B .Mr. Johnson will arrive in Shenzhen on 10th March 2016 and remain for approximately 3 days. He will leave China on 13th March 2016 back to Hong Kong. Since Mr. Johnson is expected to make several trips to China in the near future, we would appreciate it if you could issue him a multiple entry business visa.

Mr. Johnson will be financially responsible for his visit, including round-trip train ticket, room and board and other travel expenses.

If you have any questions, please feel free to contact us at any time.

Sincerely,

________________________
Marry Chan & company chop
Manager
Address:
Telephone:

中国签证的邀请函应该包括什么?

中国签证邀请函样本如下:
日期:2016年3月2日
致中国领事馆:
我们想邀请以下个人来中国进行商务访问:
姓名:Peter Johnson
性别:男性
出生日期:1970-04-01
国籍:美国公民
护照号码:12345678
Johnson先生来自A公司
Johnson 将于 2016 年 3 月10日抵达深圳并停留约 3 天。访问期间,他将与B公司的办公室经理会面。之后,将于 2016年3月13日离开中国返回香港。由于预计Johnson先生近期将多次访问中国,如果您能给他签发多次入境商务签证,我们将不胜感激。
Johnson先生将负责他的访问,包括往返火车票、食宿和其他旅行费用。
如果您有任何问题,请随时与我们联系。
勋安,
________________________
陈女士及公司印章
经理
地址:
电话: