Mr. Peter Akerley reports

ERDENE COMMENCES DRILL PROGRAM AT BAYAN KHUNDII GOLD PROJECT

Erdene Resource Development Corp. has begun its 2018 drill program at its 100-per-cent-owned Bayan Khundii gold project in southwest Mongolia.

Figures associated with this news release are available on-line.

"Drilling commenced today on the first phase of the 2018 program, which will initially focus on the new North Midfield zone where late 2017 drilling returned the highest-grade gold zone at Bayan Khundii since discovery," said Peter Akerley, Erdene's president and chief executive officer. "This drilling will test for extension and continuity of structurally controlled high-grade gold feeder zones in multiple locations, and will be followed by gradual stepout drilling to define the perimeter of the Bayan Khundii gold system in advance of a late Q3 2018 maiden resource estimate. The Bayan Khundii drill program will be followed by drill testing of more distal targets at our neighbouring Altan Arrow, Khundii North and Ulaan projects later in Q2."

Bayan Khundii drill program

The company's Q2 2018 drill program will consist of a projected 5,600 metres in approximately 25 diamond drill holes, with the following three objectives:

• Test high-priority structural targets, principally within the North Midfield and Midfield zones, based on the structural interpretation and greater understanding of controls on mineralization completed in Q4 2017 by Dr. Armelle Kloppenburg, which led to the discovery of the ultrahigh-grade intersection (2,200 grams per tonne gold over one metre) in hole BKD-231;
• Complete closer-spaced drilling within the Striker, Midfield and North Midfield zones to establish stronger continuity of gold mineralization within very high-grade gold domains, which is anticipated to lead to higher levels of confidence in their definition and associated gold grades for incorporation in the company's Q3 2018 maiden mineral resource estimate;
• Test select areas within the larger 1.2-kilometre trend that demonstrate good potential for establishing additional extensions to mineralization or to identify new mineralized zones.

North Midfield zone

In January, 2018, the company announced the discovery of ultrahigh-grade gold mineralization in the North Midfield zone, where hole BKD-231 intersected 2,200 g/t gold over one metre within 14 metres of 158 g/t gold. This intersection confirmed excellent continuity down-dip from earlier holes that included:

• BKD-110 (30 m north of BKD-231): one metre of 115 g/t gold and one metre of 108 g/t gold within 20 m of 7.2 g/t gold;
• BKD-111 (30 m northwest of BKD-231): one metre of 44 g/t gold and one metre of 33 g/t gold within 25 m of 5.3 g/t gold.

A comprehensive, independent structural study was completed at Bayan Khundii in Q4 2017 which assisted with the targeting of hole BKD-231, which is thought to be proximal to where major, deep-seated structures have intersected the northeast-trending hangingwall of the gold system. The Q2 2018 program will include follow-up drilling in this new area to establish continuity and potential extensions of the high-grade mineralization, along with the testing of additional structural targets within the North Midfield zone.

Midfield zone

In 2017, the company established strong continuity of high-grade gold mineralization within the Midfield zone. This drilling confirmed that mineralization is more proximal to surface (locally 24 m vertical depth) and also confirmed greater depth of gold mineralization, with results including:

• BKD-92: two metres of 113 g/t gold within 72 m of 4.0 g/t gold;
• BKD-98: two metres of 192 g/t gold within 80 m of 6.0 g/t gold;
• BKD-99: four metres of 69 g/t gold within 56 m of 6.1 g/t gold;
• BKD-150: two metres of 53.6 g/t gold within 17 m of 8.2 g/t gold;
• BKD-230: three metres of 36.8 g/t gold within 18 m of 7.2 g/t gold.

The company intends to complete closer-spaced drilling within the Midfield zone to establish stronger continuity of some of these very high-grade domains in order to provide higher levels of confidence in domain definition and overall gold grades for incorporation in the anticipated Q3 2018 maiden mineral resource estimate.

Striker zone

While all 51 holes within the Striker zone have intersected anomalous gold mineralization, approximately 70 per cent have returned intervals of greater than 10 g/t gold, including up to 306 g/t gold. Recent 2017 drilling returned:

• BKD-196: one metre of 43.1 g/t gold within 22 m of 2.4 g/t gold;
• BKD-222: one metre of 139 g/t gold within 23 m of 6.7 g/t gold;
• BKD-227: two metres of 19.6 g/t gold, one metre of 111 g/t gold and one metre of 40 g/t gold within 61 m of 4.2 g/t gold.

High-grade drill results from the first phase of drilling in Q4 2015 and in 2016 included:

• BKD-01: one metre of 187 g/t gold within seven metres of 27 g/t gold;
• BKD-10: one metre of 167 g/t gold within 35 m of 5.7 g/t gold;
• BKD-17: one metre of 81.7 g/t gold and three m of 49.4 g/t gold within 63 m of 5.3 g/t gold;
• BKD-44: one metre of 93.1 g/t gold within 8.3 m of 14.7 g/t gold;
• BKD-49: two metres of 62.1 g/t gold within 71 m of 3.06 g/t gold;
• BKD-77: one metre of 306 g/t gold and one metre of 30.7 g/t gold within 65 m of 6.3 g/t gold;
• BKD-84: one metre of 101 g/t gold, one metre of 16.1 g/t gold and one metre of 19.7 g/t gold within 36.7 m of 5.0 g/t gold;
• BKD-86: one metre of 94.8 g/t gold and one metre of 15.2 g/t gold within 18 m of 7.1 g/t gold.

The company plans to complete additional drilling within the Striker zone to establish stronger continuity of some of these high-grade domains.

* Reported intervals in this news release are not true width. At this time, there is insufficient data with respect to the shape of the mineralized system to calculate true orientations in space. They represent drill intersection widths from holes drilled at a dip of negative 45 degrees to negative 85 degrees and oriented to the north-northeast. The Bayan Khundii mineralization is interpreted to be moderately dipping (approximately 40 degrees to 50 degrees to the southwest).

Regional district exploration

Over the past several years Erdene has discovered a new gold district (the Khundii gold district) in southwest Mongolia that includes seven targets, two of which are considered significant prospects for development, which are being advanced toward a global mineral resource estimate in Q3 2018: Bayan Khundii and Altan Nar.

During 2018, in addition to drilling at Bayan Khundii, the company intends to complete additional drilling at its early-stage Altan Arrow gold-silver project, 3.5 kilometres north of Bayan Khundii, to follow up on high-grade results intersected from reconnaissance drilling in Q4 2017; hole AAD-12 intersected 70 g/t gold over two metres, and drilling of a new target area 300 m west of AAD-12 returned 39 g/t gold over one metre, near-surface (hole AAD-11).

The company will also complete follow-up surface exploration work at its Khundii North gold prospect, 2.5 km east of Altan Arrow, where gold-in-soil anomalism has now been traced over one kilometre, containing areas of quartz stockwork, chalcedonic quartz with hematite breccia clasts that have returned up to 22 g/t gold from initial rock chip sampling.

In addition to the company's 100-per-cent-owned gold projects, it has recently acquired a 51-per-cent interest, with the option to acquire up to 100 per cent, in the Ulaan licence, a 1,780-hectare exploration property located immediately west of the Bayan Khundii licence. The licence has no history of trenching or drilling, and is host to a very large, three-kilometre diameter intense alteration zone with characteristics thought to be related to a porphyry complex at depth. The company intends to complete a maiden drill program at Ulaan in late Q2 2018.

Through its Alliance with Teck Resources Ltd., Erdene also intends to continue to assess regional opportunities for porphyry and porphyry-related mineralization within the larger Edren terrane and intends to pursue acquisitions as opportunities arise in the Alliance's area of interest in southwest Mongolia. Erdene's Bayan Khundii, Altan Nar, Altan Arrow, Ulaan, Khuvyn Khar and Zuun Mod properties are excluded from the Teck alliance areas of interest.

Qualified person and sample protocol

Michael MacDonald, PGeo (Nova Scotia), vice-president, exploration, for Erdene, is the qualified person as that term is defined in National Instrument 43-101 and has reviewed and approved the technical information contained in this news release. All samples have been assayed at SGS Laboratory in Ulaanbaatar, Mongolia. In addition to internal checks by SGS Laboratory, the company incorporates a quality assurance/quality control sample protocol utilizing prepared standards and blanks.

Erdene's sampling protocol for drill core consisted of collection of samples over one-metre or two-metre intervals (depending on the lithology and style of mineralization) over the entire length of the drill hole, excluding minor postmineral lithologies and un-mineralized granitoids. Sample intervals were based on metreage, not geological controls or mineralization. All drill core was cut in half with a diamond saw, with half of the core placed in sample bags and the remaining half securely retained in core boxes at Erdene's Bayan Khundii exploration camp. All samples were organized into batches of 30 samples including a commercially prepared standard, blank and either a field duplicate, consisting of two quarter-core intervals, or a laboratory duplicate. Sample batches were periodically shipped directly to SGS in Ulaanbaatar via Erdene's logistical contractor, Monrud Co. Ltd.

About Erdene Resource Development Corp.

Erdene Resource Development is a Canada-based resource company focused on the acquisition, exploration and development of base and precious metals in underexplored and highly prospective Mongolia. The company has interests in five exploration licences and a mining licence in southwest Mongolia, where exploration success has led to the discovery and definition of several prospects and deposits including: Bayan Khundii -- the company's flagship and newly discovered, high-grade, near-surface gold project; Altan Nar -- an extensive, high-grade, near-surface, gold-polymetallic project located 16 kilometres northwest of Bayan Khundii; Altan Arrow -- an early-stage, high-grade gold-silver project 3.5 kilometres north of Bayan Khundii; Ulaan -- a recently acquired copper-gold porphyry prospect adjacent to Bayan Khundii; Khuvyn Khar -- an early-stage, copper-silver porphyry project; Nomin Tal -- a narrow, high-grade copper-gold discovery; and Zuun Mod -- a large molybdenum-copper porphyry deposit. In addition to the above projects, Erdene has an alliance with Teck Resources Ltd. on regional copper-gold exploration in the prospective Trans Altai region of southwest Mongolia. The Bayan Khundii licence has a 2-per-cent net smelter returns royalty (NSR royalty) in favour of Sandstorm Gold Ltd. with a buyback option to reduce the NSR royalty to 1 per cent.

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