Shihai has seasoned experience in compliance matters of MNCs operating in mainland China. He is also highly experienced in government investigation response and has successfully helped numerous clients to handle investigations involving advertising, anti-unfair competition, anti-commercial bribery, anti-monopoly and other matters, some of which involve administrative hearings, administrative reconsiderations and administrative litigations,. He specializes in legal services in advertising, anti-unfair competition, anti-monopoly, anti-commercial bribery, trademark and trade secret infringement, consumer protection, corporate governance, government relations, etc.

Shihai has published multiple law reviews on official AMR journals such as Biweekly of Administrative for Industry and Commerce and China Market Regulation News (former China Industry and Commerce News). He was invited by various forums, conferences and foreign chambers of commerce for speeches and trainings.

张士海律师在处理跨国公司在中国大陆经营的合规方面具有丰富经验。在应对政府调查方面他同样具有丰富的经验，他成功处理过大量涉及广告、反不正当竞争、反商业贿赂、反垄断等的政府调查，包括相关的行政听证、行政复议和行政诉讼等。他专注于从事广告、竞争与反垄断、反商业贿赂、商标侵权、商业秘密侵权、消费者权益保护、公司治理、政府关系处理等领域的法律服务。

张律师在《工商行政管理》、《市场监管报》（原《中国工商报》）等执法机构官方刊物发表多篇专业文章，多次受到各种论坛、会议组织、外国在华商会邀请进行会议主题发言或提供培训。