Why is the direct train from Huangchuan to Kunshan Station gone?

Gone. You need to transfer at Lu'an Station.

It's a pity, it's really inconvenient without it.

It has been canceled for more than half a year. The railway department issued a new regulation last year, banning ordinary trains on the Hefei-Nanjing railway (only bullet trains and high-speed trains are allowed). As a result, the train from Huangchuan could not continue to go to Jiangsu Province along the original route after arriving in Hefei. You can transfer to high-speed rail or high-speed rail in Hefei to Kunshan.