His party was banned. He faces jail. But Thailand's Thanathorn Juangroongruangkit vows to fight on

Future Forward Party leader Thanathorn Juangroongruangkit during the party's final major campaign rally in Bangkok on March 22, 2019.

(CNN)He's the billionaire scion of Thailand's biggest auto parts manufacturer who could have led a quiet, comfortable life in the upper echelons of Thai society.

Instead, Thanathorn Juangroongruangkit is fighting to save his country's democracy, and in doing so has put himself in the crosshairs of the military-led government.
Last week, Future Forward, the pro-democracy political party Thanathorn founded in 2018, and which came third in Thailand's election last year with 6.3 million votes, was banned by a Thai court for violating election laws.
    Angered by what they saw as political interference, students are leading pro-democracy rallies around the country calling for former general-turned-prime minister, Prayut Chan-o-cha, to step down, six years after he seized power in a coup in 2014.
      In just two years, Future Forward and its leaders have been hit with more than 20 legal cases, including criminal charges that could result in jail time. Thanathorn denies wrongdoing and says the cases are politically motivated.
      The party's platform of democratic and military reform, and decentralized power, would require deep structural changes to the Thai political system.
      Thanathorn Juangroongruangkit with Future Forward Party officials and supporters at their headquarters in Bangkok on January 21, 2020.
      "It's clear that we confront the rule of the junta very directly," Thanathorn said. "All these things are quite provocative, it's quite radical when it comes to Thai politics."
        While Thanathorn's ambitions to bring about reform from within parliament are scuppered for now, he is poised to lead what he sees as a burgeoning democratic movement.
        His life's mission is, he says, to "break the chains" of a system that is preventing Thailand from progressing, and put power in the hands of the people.
        It's a mission that could soon see him jailed.
        "It is the cost of the struggle, it is the cost to bring democracy back to Thailand and it is the cost I'm willing to pay," he says.

        The billionaire commoner

        Thanathorn Juangroongruangkit (front right) with his parents and siblings in 1998.
        Thanathorn's grandparents moved to Thailand as poor Chinese immigrants about 70 years ago, and he remembers his parents working day and night to feed the family.
        His father had two jobs, selling noodles during the day and fixing motorcycle seats at night, while his mother sold fish maw soup in China Town. Their fortunes started to change when a representative from Yamaha asked Thanathorn's father to produce motorbike seats for them.
        The business, which he started with his brother, started to grow, as big brands including Honda, Suzuki, and Kawazaki, placed orders. The family turned Thai Summit Group into a multi-billion dollar company.
        Thanathorn says his parents kept him grounded by making him get part-time jobs during the summer holidays.
        "I would do the dishwashing in the restaurants, (work as) the bell boy in hotels, I do the loading and unloading in the warehouse," he said.
        In his twenties, Thanathorn studied mechanical engineering at Bangkok's prestigious Thammasat University.
        The university has a long history of political activism.
        One of its campuses was the site of the October 6, 1976 massacre, when state security and far-right paramilitary forces opened fire on leftist students protesting the return of a former military dictator. Students were shot, beaten and murdered. The official death toll is 46, but survivors claim it was more than 100.
        Thanathorn immersed himself in the student movement.