第二个that是做什么成分？属于什么从句？急急急！

第二个 that 是定语从句的引导词/连接词，在英语语法上叫做关系（代）词，它引导的是一个限制性定语从句。

其中，关系代词 that 代指先行词（即被该限制性定语从句所修饰的名词/代词）products，并在该定语从句中充当谓语 can buy 的宾语。

(that) people can buy in all parts of the world

= people can buy (that) in all parts of the world

= people can buy (high-technology products) in all parts of the world

大概说的就是那个that吧，同位语从句，主句是the chance has decreased，从句是any individual graduate finds a job，that在从句中不作成分
根据that来区别。引导定语从句的that是关系代词，除了起连接主句和从句的作用外，还代替先行词在从句中充当一个成分。而且这个that还常可以用which来代替。引导同位语从句的that是个连词，只起连接主句和从句的作用，在从句中不充当任何成分，也不能用which来代替

第二个that引导的是名词性从句 作主语 是宾语从句中的主语从句 it是形式主语 that从句是真主语 注意 因为表语是important 其主语从句的谓语 要用虚

通俗点讲，就是起个开头引导的作用，翻译成中文更好理解一点，举个例子：That you won the first prize really surprised me.那个，你得了一等奖这件事啊，真是令我惊讶。英文里的that，就可以理解中文里的“那个”，就是为了引出来“你得了一等奖”这件事。希望对题主有用。

However, he hopes that in the future China will also get better at making high-technology products that people can buy in all parts of the world.
意思是：
然而，他希望未来中国也能更好地制造人们在世界各地都能买到的高科技产品。

he hopes that引导宾语从句； in the future China will also get better at making high-technology products that （引导定语从句， 修饰前面的名词products）people can buy in all parts of the world.
第二个that 引导定语从句， 修饰products。