Just want to point out there are at least 4x 056 operating in formation as there is one 2nd nearest mostly blocked by 625 in the top picture.From near to far: 625 "Bazhong", another 056 shadowed by her, 552 "Guangyuan" and 520 "Hanzhong", probably in an ASW exercise (note the sonar cable towed by 625).
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In a column formation:
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Original footnote for both pictures: Three guided-frigates attached to the frigate flotilla of a navy base under the PLA Southern Theater Command steam in formation during a training exercise in waters of the South China Sea on Jan. 4, 2021. (eng.chinamil.com.cn/Photo by Zhang Bin)