Are Huayin and Ji'an, Jilin both in China?
yes
Title: Changchun–Jilin Intercity Railway
Passage: Changchun–Jilin Intercity Railway is a high-speed rail line in Jilin Province, China, which opened for service on January 11, 2011.  It is the first intercity high-speed rail to be operational in Northeast China.  Like the Shanghai–Nanjing Intercity High-Speed Railway, which services Shanghai Hongqiao International Airport, the Changchun–Jilin Intercity Railway serves as an airport rail link for the cities of Changchun and Jilin.
Title: Huayin
Passage: Huayin is a county-level city in Weinan, Shaanxi, China.  Prior to 1990, Huayin had been regarded as a county.  Huayin literally means "to the north of Mount Hua", because it is situated to the north of that mountain.
Title: Ji'an, Jilin
Passage: Ji'an (; formerly ) is a county-level city in southwestern part of Jilin province, People's Republic of China.  It is administered by the prefecture-level city of Tonghua.  Ji'an has an area of 3408 km2 and a population of approximately 230,000.  The city was given its current status in 1988.  Ji'an is separated from Manpo, Chagang Province, North Korea by the Yalu River; it has an international border running 203.5 km .
Ji'an, Jilin Huayin