The board of directors of Greentech Technology International Limited provided an update on the mineral resources for the Renison Tin Operations in Tasmania, Australia. Key Assumptions and JORC 2012 Requirements: Mineral Resources are reported inclusive of Ore Reserves. Mining production data up to 31 March 2023 and all exploration information has been included.

Mineral Resources have been depleted for mining to 31 March 2023. The tin price assumption used to estimate Mineral Resources is USD 23,500/t Sn at an assumed exchange rate of USD/AUD 0.7 giving a price of AUD 33,571/t Sn. The Mineral Resources have been classified in accordance with the guidelines set out in the Australasian Code for Reporting Exploration Results, Mineral Resources and Ore Reserves, published by the Joint Ore Reserves Committee (JORC), of the Australasian Institute of Mining and Metallurgy, the Australian Institute of Geoscientists and the Minerals Council of Australia, December 2012.

Mineral Resource Governance Statement: Governance of the Mineral Resources development and management activities are managed through the management team of Renison Tin Operation (Renison) in Tasmania which is 50%-owned by YTPAH through BMTJV. Senior geological and mining engineering staff of BMTJV oversee reviews and technical evaluations of the estimates and evaluate these with reference to actual physical, cost and performance measures. The evaluation process also draws upon internal skill sets in operational and project management, ore processing and commercial/financial areas of the business.

The BMTJV Management Committee is responsible for monitoring the planning, prioritisation and progress of exploratory and resource definition drilling programs and the estimation and reporting of Mineral Resources. These definition activities are conducted within a framework of quality assurance and quality control protocols covering aspects including drill hole siting, sample collection, sample preparation and analysis as well as sample and data security. A four-level compliance process guides the control and assurance activities by BMTJV: Provision of internal policies, standards, procedures and guidelines.

Mineral Resource reporting based on well-founded geological and mining assumptions and compliance with external standards such as the JORC Code. Internal review of process conformance and compliance. Internal assessment of compliance and data veracity.

The BMTJV Management Committee aims to promote the maximum conversion of identified mineralisation into Mineral Resources compliant with JORC 2012. Competent Persons are members of the Australasian Institute of Mining and Metallurgy (AusIMM) and/or the Australian Institute of Geoscientists (AIG), and qualify as Competent Persons as defined in the JORC Code 2012. Summary of Material Information: Drilling techniques, sampling and sub-sampling techniques: The bulk of the data used in resource calculations at Renison has been gathered from diamond core using NQ2, LTK60 and LTK48 sizes.

This core is geologically logged and subsequently halved for sampling. Drill hole samples are typically whole core sampled to streamline the core handling process if required. Each development face/round is horizontally chip sampled with the sampling intervals being domained by geological constraints.

Sludge drilling is performed with an underground production or development drill rigs (nominal 64mm-89mm diameter hole). It is an open hole drilling method using water as the flushing medium. Criteria for classification: Resources are classified in line with JORC guidelines utilising a combination of various estimation derived parameters, the input data and geological/mining knowledge.

This approach considers all relevant factors and reflects the Competent Person 's view of the deposit. At Renison, material classified as Measured must have development (with face samples) within 20m. Indicated Mineral Resource must have sufficient grade and geological continuity with drill hole intersections generally between 40m and 20m apart.

Inferred Mineral Resource is material that is defined by drill hole intersections between 120m and 40m apart. Geological continuity may be present, but the grade estimate is lower in confidence. Sample analysis method: Samples are dried at 90°C, then crushed to <3mm, samples are then riffle split to obtain a sub sample of approximately 100g which is then pulverized to 90% passing 75 um.

A 2g subsample of the pulp sample is then weighed with 12g of reagents including a binding agent, the weighed sample is then pulverized again for one minute. The sample is then compressed into a pressed powder tablet for introduction to the XRF. Sn, As and Cu have a detection limit 0.01%, Fe and S detection limits are 0.1%.

Each XRF batch of twenty consists of one blank, one internal standard, one duplicate and a replicate. Anomalous assay results are re-assayed to ensure quality control. Estimation methodology: All modelling and estimation work undertaken by BMTJV is carried out via LeapfrogTM and Surpac VisionTM software by creating three-dimensional ore body wireframes using sectional techniques.

Drill hole intersections within the three-dimensional wireframes are composited and statistical analysis is conducted to determine appropriate search parameters within individual domains. An empty block model is created, and grade estimation is undertaken using ordinary Kriging estimation methods. The resource is then depleted using mining voids and subsequently classified in line with JORC guidelines as above.

Cut-off grades: The Mineral Resource reporting cut-off grade is 0.65% Sn at Renison Bell. Mining and metallurgical methods and parameters: The Renison mine predominantly applies up-hole benching and open stoping mining methods with (in some cases), post fill and cemented rock fill to fill voids as much as possible. A slurry type fill is planned to be used to backfill a portion of the stope voids of the high-grade wide ore zone in Area 5. A mining dilution of 5% to 15% at zero grade is used to estimate the Ore Reserve.

Minimum widths for underground development are 5m and for stoping minimum widths are 3m. Historical Mining recoveries of 75 to 98% are applied to estimate ore reserves. The Renison mine produces a tin concentrate of grade targeting 57% Sn with internal process designed to reduce penalty metals such as iron, sulphur, tungsten and copper.

The metallurgical process is complex and applies several stages of gravity-type concentration as well as sulphide and oxide flotation, regrinding and acid leach methods. The metallurgical recovery is estimated from plant feed grades and is based on historical plant performance with modifying factors for different ore sources. Metallurgical recoveries, current and future projected costs and mining factors were considered as part of the cut-off grade analysis.