Exhibit 99.1

May 22, 2020	AMENDED
Nova Scotia Securities Commission	Securities Commission of Newfoundland and Labrador
Alberta Securities Commission	Saskatchewan Financial and Consumer Affairs Authority
Manitoba Securities Commission	New Brunswick Financial and Consumer Services Commission
Ontario Securities Commission	British Columbia Securities Commission
Superintendent of Securities, Prince Edward Island	Autorité des marchés financiers
Superintendent of Securities, Northwest Territories	Superintendent of Securities, Yukon Territory
Superintendent of Securities, Nunavut

RE: Turquoise Hill Resources Ltd.

Pursuant to a request from the above-mentioned reporting issuer, we wish to advise you of the following information in connection with its Annual & Special Meeting of Shareholders:

Date of meeting:	July 24, 2020
Record date for notice:	June 18, 2020
Record date for voting:	June 18, 2020
Beneficial ownership determination date:	June 18, 2020
Securities entitled to notice:	Common Shares
Securities entitled to vote:	Common Shares
Issuer mailing directly to non-objecting beneficial owners:	No
Issuer will pay for objecting beneficial owner material distribution:	Yes
Issuer using notice-and-access for registered investors:	No
Issuer using notice-and-access for non-registered investors:	No
Notice-and-access stratification criteria:	No

Sincerely,

Trust Central Services

AST Trust Company (Canada)