EXHIBIT 5.1

May 11, 2007

Yingli Green Energy Holding
   Company Limited
No. 3055 Middle Fuxing Road
Baoding 071051
People's Republic of China

Dear Sirs,

YINGLI GREEN ENERGY HOLDING COMPANY LIMITED (THE "COMPANY")

We have acted as special Cayman legal counsel to the Company in connection with
the public offering on the New York Stock Exchange of American Depositary Shares
representing ordinary shares issued by the Company (the "Shares") and the offer
and sale of such number of ordinary shares of the Company (the "Issued Shares")
by certain selling shareholder(s) of the Company as described in the prospectus
contained in the Company's registration statement on Form F-1 (the "Registration
Statement" which term does not include any exhibits thereto) filed by the
Company under the United States Securities Act of 1933 (the "Securities Act")
with the United States Securities and Exchange Commission (the "Commission").

For the purposes of giving this opinion, we have examined and relied upon copies
of the following documents:

(i)  the Registration Statement; and

(ii) a draft of the prospectus (the "Prospectus") contained in the Registration
     Statement.

We have also reviewed and relied upon (1) the memorandum of association and the
articles of association of the Company, (2) copies of written resolutions passed
by all the directors of the Company on May 11, 2007,(3) a copy of the register
of members of the Company, and (4) such other documents and made such enquiries
as to questions of law as we have deemed necessary in order to render the
opinion set forth below.


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We have assumed (i) the genuineness and authenticity of all signatures, stamps
and seals and the conformity to the originals of all copies of documents
(whether or not certified) examined by us and the authenticity and completeness
of the originals from which such copies were taken; and (ii) the accuracy and
completeness of all factual representations made in the Prospectus and
Registration Statement and other documents reviewed by us.

We have made no investigation of and express no opinion in relation to the laws
of any jurisdiction other than the Cayman Islands. This opinion is to be
governed by and construed in accordance with the laws of the Cayman Islands and
is limited to and is given on the basis of the current law and practice in the
Cayman Islands.

On the basis of and subject to the foregoing, we are of the opinion that:

(1)  The Company is duly incorporated and existing under the laws of the Cayman
     Islands.

(2)  The issue of the Shares has been duly authorised, and when the Shares have
     been issued, delivered and paid for in the manner described in and pursuant
     to the terms of the Prospectus and Registration Statement will be validly
     issued, fully paid and non-assessable (meaning that no further sums are
     required to be paid by the holders thereof in connection with the issue or
     holding of such shares to the Company or any third party).

(3)  The Issued Shares are validly issued, fully paid and non-assessable.

We hereby consent to the filing of this opinion with the Commission as an
exhibit to the Registration Statement and to the references to us under the
headings "Taxation", "Enforceability of Civil Liabilities" and "Legal Matters"
in the Prospectus contained in the Registration Statement. In giving such
consent, we do not thereby admit that we come within the category of persons
whose consent is required under Section 7 of the Securities Act, or the Rules
and Regulations of the Commission thereunder.

Yours faithfully,

/s/ Conyers Dill & Pearman
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Conyers Dill & Pearman


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