附件 5.1

大成 US LLP 1221 大道 美洲 NY 10020-1089美国 Dentons.com

2023年11月7日

Aurora 技术收购公司

4恩巴卡迪罗中心

套房 1449

加利福尼亚州圣弗朗西斯科94105

女士们、先生们：

We have acted as special legal counsel to Aurora Technology Acquisition Corp., a Cayman Islands exempted company ( “ATAK”), in connection with the Registration Statement on Form S-4, initially filed with the U.S. Securities and Exchange Commission (the “Commission”) on May 12, 2023 (File No. 333- 271890), as amended and supplemented through the date hereof pursuant to the Securities Act of 1933, as amended (the “Act”) (such Registration Statement, as amended or supplemented, is hereafter referred to as the “Registration Statement”), relating to the Business Combination Agreement, dated February 26, 2023 (as amended and supplemented from time to time, the “Business Combination Agreement”) by and among ATAK, Aurora Technology Merger Sub Corp., a Nevada corporation and a direct, wholly-owned subsidiary of ATAK (“ATAK Merger Sub”), and DIH Holding US, Inc., a Nevada corporation (“DIH”). Pursuant to the Business Combination Agreement, ATAK will change its jurisdiction of incorporation to Delaware (the “Domestication”) pursuant to Part XII of the Companies Law (Revised) of the Cayman Islands and domesticate as a Delaware corporation in accordance with Section 388 of the General Corporation Law of the State of Delaware (the “DGCL”) by filing a certificate of corporate domestication simultaneously with a certificate of incorporation, in each case in respect of ATAK with the Secretary of State of the State of Delaware (the “Delaware Secretary of State”). The Domestication is subject to the approval of the shareholders of ATAK. In connection with the transactions contemplated by the Business Combination Agreement (collectively, the “Transactions”), ATAK will be renamed “DIH Holding US, Inc.” and is referred to herein as “New DIH.” We refer herein to ATAK following effectiveness of the Domestication as “New DIH.”

In connection with the Domestication: (i) each of the then issued and outstanding Class B ordinary shares of ATAK, par value $0.0001 per share (each a “Class B Ordinary Share”) will convert automatically, on a one-for-one basis, into a share of Class B common stock, par value $0.0001 per share, of ATAK (after the Domestication) (the “Domesticated Class B Common Stock”); (ii) each of the then issued and outstanding Class A ordinary shares of ATAK, par value $0.0001 per share (each a “Class A Ordinary Share”) will convert automatically, on a one-for-one basis, into a share of Class A common stock, par value $0.0001 per share, of ATAK (after the Domestication) (the “New DIH Class A Common Stock”); (iii) each of the then issued and outstanding warrants, each two warrants representing the right to purchase one Class A Ordinary Share, will convert automatically into warrants to acquire shares of New DIH Class A Common Stock pursuant to the related warrant agreement (each warrant, a “New DIH Warrant”); (iv) each of the then issued and outstanding rights, each ten rights representing the right to receive one Class A Common Share, will convert automatically into rights to receive shares of New DIH Class A Common Stock (each right, a “New DIH Right”); and (v) each of the then issued and outstanding units of ATAK will be canceled and each holder will be entitled to one share of New DIH Class A Common Stock, one New DIH Warrant and one New DIH Right.

Zaanouni 律师事务所及合伙人LuatViet Fernanda Lopes & Associados Guevara & Gutierrez Paz Horowitz 律师事务所及合伙人Adegados Sirote Adepetun Caxton-Martins Agbor & Segun Davis Brown东非律师事务所 欲了解更多关于合并成立大成的律所的信息，请访问dentons.com/legacyfirms

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在业务合并之前，国内B类普通股的每个已发行和流通股将自动转换， 在一对一的基础上，转换为新DIH A类普通股（“发起人股份转换”）。

本 意见是针对以下公司根据上述注册声明进行的注册而提出的：（i）52，078，123股在转换ATAK A类普通股和注销ATAK单位时可发行的新DIH A类普通股，以及 （ii）26，670股，于转换ATAK认股权证及注销ATAK基金单位时可予发行之新DIH认股权证。

在编写本意见时，我们除其他外审查了：

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在本意见书中，我们假设提交给我们的所有文件原件的真实性、提交给我们的所有文件副本与原件的一致性 以及提交给我们的所有文件副本原件的真实性。我们 还承担了所有自然人的法律行为能力、签署与本意见 相关的所有文件的人员的签名的真实性、代表各方签署的此类人员的权限以及各方（ATAK除外）对所有文件的适当授权、 执行和交付。我们尚未独立确定或核实与本文所述意见相关的任何 事实，但依赖ATAK和其他人的官员和其他代表 的声明和陈述。

根据本意见中确定的假设、限制、排除和其他限制，我们建议您：

此外，在提出上述意见时，我们假定：

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在陈述本意见书时，我们依据的是德顿的意见，晚餐马丁的律师于2021年12月30日提交了 ，作为ATAK提交的S-1表格登记声明的证据5.2。

我们以上表达的意见受以下限制限制：(I)任何破产、资不抵债、重组、欺诈性转让、欺诈性转让、暂缓转让或其他类似法律或该领域司法发展的理论(如实质性合并或衡平法从属原则)的适用性、遵从性或影响，(Ii)衡平法的一般原则(无论是否在衡平法或法律上考虑强制执行)，(Iii)诚实信用和公平交易的默示契约，(4)可能限制当事人获得某些补救的权利的公共政策考虑因素；(5)任何关于以非美元计价的任何担保的债权(或关于该债权的以非美元计价的判决)按根据适用法律确定的日期的有效汇率兑换成美元的任何要求；(6)政府有权限制、延迟或禁止 在美国境外或以外币或货币单位付款，以及(Vii)任何法律，但纽约州和DGCL的法律除外。我们建议您，本信函中涉及的问题可能全部或部分由其他法律管辖，但我们不会就我们的意见所依据的法律与可能实际管辖的任何其他法律之间是否存在任何相关差异发表意见。就本意见而言，我们认为没有必要，因此，我们不打算在此涵盖各州证券或蓝天法律在发行本意见所涵盖的证券时的适用情况。

本意见仅限于本文所述的具体问题，不得推断或暗示超出本意见明文规定的内容。 如果纽约州或DGCL的现行法律因立法行动、司法裁决或其他原因而改变，我们不承担任何修改或补充本意见的义务。

我们在此同意将本意见作为注册声明的附件5.1提交给欧盟委员会。我们也同意在注册声明中“法律事项”标题下对我公司的引用。在给予此同意时，我们并不因此而承认我们属于该法第7节或委员会规则和条例 所要求获得同意的人员类别。