SHANGHAI - Tencent-backed Chinese video game publisher iDreamSky Technology Holdings and Russian tech firm Mail.ru Group's games unit said on Thursday that they will be establishing a long-term partnership to expand their global presence.

The two companies made the announcement at a press conference held on the eve of the China Digital Entertainment Expo and Conference, also known as ChinaJoy, which takes place in Shanghai between Aug 2-5.

Reuters reported on Wednesday that the two companies were forming an alliance.

The partnership will work on cross-publishing games in domestic markets, and are currently working on bringing a game called "War Robot" into China, pending license approval.

(Reporting by Brenda Goh; Editing by Tom Hogue) ((brenda.goh@thomsonreuters.com; +86 (0) 21 6104 1763; Reuters Messaging: brenda.goh.thomsonreuters.com@reuters.net))