Thailand Travel Mart Plus (TTM+) One of the biggest national travel mart will be held in Chiang Mai for the first time. 

  
The main venue will be CMECC

Tourism Authority of Thailand (TAT) stated in their website as follows:

THAILAND TRAVEL MART PLUS AMAZING GATEWAY TO THE GREATER MEKONG SUBREGION (TTM+): THE BIGGEST TRAVEL BUSINESS TO BUSINESS OPPORTUNITY
With cooperation between the Tourism Authority of Thailand (TAT) and the Thai tourism industry, Thailand has the honor to be the host of the largest B2B event ‘Thailand Travel Mart Plus Amazing Gateway to the Greater Mekong Subregion’ (TTM+).
The event, first organized in 2001, has the uttermost objective to promote the tourism and service business in Thailand and its Greater Mekong Subregion (GMS) counterparts. Small and medium entrepreneurs (SMEs) have also been supported on the international stage with their products on offer. The major markets include Europe, South East Asia, Eastern Asia, the United States, Australia, and New Zealand, as well as emerging ones; such as, the CIS countries, Eastern Europe, Middle East, South America, and South Africa.
TAT is pleased to invite applicants from all over the world to participate in the Thailand Travel Mart Plus 2016. Application forms can be found on the official website only from 15 Dec,2015 – 29 Feb, 2016. In this period, over 400 booths are available for travel operators and service businesses across Thailand and the GMS countries. This year 9 business categories also arranged for the event are 12 Hiden Gems,Hotel / Resort, Tour Operator / Travel Agent, Entertainment, Transportation, Association, NTO, The Greater Mekong Subregion: GMS, and Other Travel Service
For the year 2016, the Thailand Travel Mart Plus is scheduled to be held on 8-10 June, at the Chiang Mai International Exhibition and Convention Centre (CMECC), focusing on trade and business talks among operators and participants. Moreover, as an added bonus, TTM+ buyers and media can also enjoy a full range of post tours from 11 June onwards, showcasing Thailand’s world-renowned natural beauty and rich cultural heritage.
We would like to take this opportunity to thank you for your interest in joining the TTM+ 2016 and your continued support in promoting Thailand.
Wishing you many positive and fruitful results, and a most pleasant time during the TTM+ 2016 in Thailand.

More info: See http://www.thailandtravelmartplus.com/about_ttm.php#